1
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Idosa DA, Abebe M, Mani D, Paduvilan JK, Thottathi L, Thankappan A, Thomas S, Kim JY. Cesium lead bromide perovskite nanocrystals synthesized via supersaturated recrystallization at room temperature: comparison of one-step and two-step processes. NANOSCALE ADVANCES 2024; 6:4137-4148. [PMID: 39114153 PMCID: PMC11302073 DOI: 10.1039/d4na00423j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Accepted: 06/17/2024] [Indexed: 08/10/2024]
Abstract
Over more than a decade, lead halide perovskites (LHPs) have been popular as a next-generation semiconductor for optoelectronics. Later, all-inorganic CsPbX3 (X = Cl, Br, and I) nanocrystals (NCs) were synthesized via supersaturated recrystallization (SR) at room temperature (RT). However, compared to the hot injection (HI) method, the formation mechanism of NCs via SR-RT has not been well studied. Hence, this study will contribute to elucidating SR-RT based on the LaMer model and Hansen solubility parameter. Herein, we also demonstrate the entropy-driven mixing between two dissimilar polar-nonpolar (DMF-toluene) solvents. Next, we find that, in a poor solvent (toluene ≫ DMF in volume), ∼60 nm sized CsPbBr3 NCs were synthesized in one step, whereas in a marginal solvent (toluene ≈ DMF), ∼3.5 nm sized NCs were synthesized in two steps, indicating the importance of solvent polarity, specifically the 'solubility parameter'. In addition, in the presence of a CuBr2 additive, high-quality cubic NCs (with ∼3.8 nm and ∼21.4 nm edge sizes) were synthesized. Hence, through this study, we present a 'solubility parameter-based nanocrystal-size control model' for SR-RT processes.
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Affiliation(s)
- Dula Adugna Idosa
- Faculty of Materials Science and Engineering, Jimma Institute of Technology, Jimma University P. O. Box 378 Jimma Ethiopia
- Department of Physics, College of Natural and Computational Science, Mizan-Tepi University P. O. Box 260 Mizan Ethiopia
| | - Mulualem Abebe
- Faculty of Materials Science and Engineering, Jimma Institute of Technology, Jimma University P. O. Box 378 Jimma Ethiopia
| | - Dhakshnamoorthy Mani
- Faculty of Materials Science and Engineering, Jimma Institute of Technology, Jimma University P. O. Box 378 Jimma Ethiopia
| | | | - Lishin Thottathi
- Department of Physics and Mathematics, Università Cattolica del Sacro Cuore Via della Garzetta, 48 25133 Brescia BS Italy
| | | | - Sabu Thomas
- School of Energy Materials, Mahatma Gandhi University Kottayam 686560 India
| | - Jung Yong Kim
- Department of Materials Science and Engineering, Adama Science and Technology University P. O. Box 1888 Adama Ethiopia
- Center of Advanced Materials Science and Engineering, Adama Science and Technology University P. O. Box 1888 Adama Ethiopia
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2
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Wang Y, Chen J, Zhou H, Liu C, Chen Y, Xia J, Yang Q, Liu L, Chen S. The Crystallization Regulation Effect of the Phenyl Ring of Passivators for Blue Perovskite Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2024; 16:38300-38309. [PMID: 38991148 DOI: 10.1021/acsami.4c05803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
Although metal halide perovskites (MHPs) have demonstrated remarkable external quantum efficiencies (EQEs) in red and green light-emitting diodes (LEDs), the blue ones confront efficiency and stability problems due to the high defect density in the perovskite films. Large amounts of defect passivation strategies are successfully developed to improve the device performance. Nevertheless, the influence of the molecular configuration of the passivators on the perovskite crystallization process has not been comprehensively investigated so far. Here, we investigate the effect of the phenyl ring on the perovskite crystallization dynamics and the passivation effect. The additive with a phenyl ring performs the π-π stacking ability with phenethylammonium (PEA+) molecules, resulting in a deteriorated crystallinity and a weakened passivation ability. Conversely, the additive without the phenyl ring is helpful to promote the participation of PEA+ molecules in the crystalline process, leading to a higher crystallinity and a stronger passivation effect. As a result, the EQE of the blue perovskite LED has increased from 4.72 to 11.06% by using the phenyl ring-free additive. Therefore, it is advisible to develop the conjugated nonplanar additives in the PEA+-assisted quasi-two-dimensional perovskites. This finding may enlighten the rational design of defect passivators for highly efficient perovskite LEDs.
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Affiliation(s)
- Yun Wang
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Jian Chen
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Huilin Zhou
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Chenxi Liu
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Yanfeng Chen
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Junmin Xia
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Qingqing Yang
- Anhui Key Laboratory of Magnetic Functional Materials and Devices, School of Materials Science and Engineering, Anhui University, Hefei 230601, China
| | - Lihui Liu
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Shufen Chen
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
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Xiao X, Latt KZ, Gong J, Kim T, Connell JG, Liu Y, Fry HC, Pearson JE, Wostoupal OS, Li M, Soldan C, Yang Z, Schaller RD, Diroll BT, Hla SW, Xu T. Light-induced Kondo-like exciton-spin interaction in neodymium(II) doped hybrid perovskite. Nat Commun 2024; 15:6084. [PMID: 39030160 PMCID: PMC11271502 DOI: 10.1038/s41467-024-50196-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 07/02/2024] [Indexed: 07/21/2024] Open
Abstract
Tuning the properties of a pair of entangled electron and hole in a light-induced exciton is a fundamentally intriguing inquiry for quantum science. Here, using semiconducting hybrid perovskite as an exploratory platform, we discover that Nd2+-doped CH3NH3PbI3 (MAPbI3) perovskite exhibits a Kondo-like exciton-spin interaction under cryogenic and photoexcitation conditions. The feedback to such interaction between excitons in perovskite and the localized spins in Nd2+ is observed as notably prolonged carrier lifetimes measured by time-resolved photoluminescence, ~10 times to that of pristine MAPbI3 without Nd2+ dopant. From a mechanistic standpoint, such extended charge separation states are the consequence of the trap state enabled by the antiferromagnetic exchange interaction between the light-induced exciton and the localized 4 f spins of the Nd2+ in the proximity. Importantly, this Kondo-like exciton-spin interaction can be modulated by either increasing Nd2+ doping concentration that enhances the coupling between the exciton and Nd2+ 4 f spins as evidenced by elongated carrier lifetime, or by using an external magnetic field that can nullify the spin-dependent exchange interaction therein due to the unified orientations of Nd2+ spin angular momentum, thereby leading to exciton recombination at the dynamics comparable to pristine MAPbI3.
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Affiliation(s)
- Xudong Xiao
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois, USA
| | - Kyaw Zin Latt
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois, USA
| | - Jue Gong
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois, USA
| | - Taewoo Kim
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois, USA
| | - Justin G Connell
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois, USA
| | - Yuzi Liu
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois, USA
| | - H Christopher Fry
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois, USA
| | - John E Pearson
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois, USA
| | - Owen S Wostoupal
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois, USA
| | - Mengyuan Li
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois, USA
| | - Calvin Soldan
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois, USA
| | - Zhenzhen Yang
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois, USA
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois, USA
| | - Benjamin T Diroll
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois, USA.
| | - Saw Wai Hla
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois, USA.
| | - Tao Xu
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois, USA.
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Lu Y, Alam F, Shamsi J, Abdi-Jalebi M. Doping Up the Light: A Review of A/B-Site Doping in Metal Halide Perovskite Nanocrystals for Next-Generation LEDs. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:10084-10107. [PMID: 38919725 PMCID: PMC11194817 DOI: 10.1021/acs.jpcc.4c00749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 05/29/2024] [Accepted: 05/29/2024] [Indexed: 06/27/2024]
Abstract
All-inorganic metal halide perovskite nanocrystals (PeNCs) show great potential for the next generation of perovskite light-emitting diodes (PeLEDs). However, trap-assisted recombination negatively impacts the optoelectronic properties of PeNCs and prevents their widespread adoption for commercial exploitation. To mitigate trap-assisted recombination and further enhance the external quantum efficiency of PeLEDs, A/B-site doping has been widely investigated to tune the bandgap of PeNCs. The bandgap of PeNCs is adjustable within a small range (no more than 0.1 eV) by A-site cation doping, resulting in changes in the bond length of Pb-X and the angle of [PbX6]4. Nevertheless, B-site doping of PeNCs has a more significant impact on the bandgap level through modification of surface defect states. In this perspective, we delve into the synthesis of PeNCs with A/B-site doping and their impacts on the structural and optoelectronic properties, as well as their impacts on the performance of subsequent PeLEDs. Furthermore, we explore the A-site and B-site doping mechanisms and the impact of device architecture on doped PeNCs to maximize the performance and stability of PeLEDs. This work presents a comprehensive overview of the studies on A-site and B-site doping in PeNCs and approaches to unlock their full potential in the next generation of LEDs.
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Affiliation(s)
- Ying Lu
- Institute
for Materials Discovery, University College
London, Malet Place, London WC1E
7JE, United Kingdom
| | - Firoz Alam
- Department
of Electronic and Electrical Engineering, University College London, London WC1E 6BT, United
Kingdom
| | - Javad Shamsi
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Mojtaba Abdi-Jalebi
- Institute
for Materials Discovery, University College
London, Malet Place, London WC1E
7JE, United Kingdom
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5
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Roy D, Guha S, Acharya S. Fabrication of water-resistant fluorescent ink using the near-unity photoluminescence quantum yield of CsPbBr 3 doped with NiBr 2. NANOSCALE 2024; 16:9811-9818. [PMID: 38687330 DOI: 10.1039/d4nr00668b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Doping with transition and alkaline earth metal ions into all-inorganic perovskite nanocrystals (NCs) has attracted attention recently for tuning the photoluminescence quantum yield (PLQY). We report on the hot injection synthesis of nickel ion-doped CsPbBr3 NCs with near-unity PLQYs. Nickel ions were successfully incorporated into the octahedral environment of CsPbBr3 NCs, replacing the lead ions. The introduction of nickel ions into CsPbBr3 NCs substantially eliminates intrinsic defects and halide vacancies for improved structural order and near-unity PLQYs. Benefiting from these unique properties, nickel ion-doped CsPbBr3 NCs were dispersed in a polymer to prepare an efficient fluorescent ink. The fluorescent ink shows excellent thermal and water stability under harsh environmental conditions. Moreover, the usefulness of the fluorescent ink for security purposes was demonstrated by designing and recognizing a fluorescent QR code. This study reveals that doped CsPbBr3 NCs can be used to prepare efficient water-resistant fluorescent ink for anti-counterfeiting applications, widening the usefulness of doped all-inorganic perovskite NCs.
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Affiliation(s)
- Dipanwita Roy
- School of Applied and Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
| | - Shramana Guha
- School of Applied and Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
| | - Somobrata Acharya
- School of Applied and Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
- Technical Research Centre (TRC), Indian Association for the Cultivation of Science, Kolkata 700032, India
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6
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Wang J, Zhang C, Li S, Guo Q, Bai Y, Jia G. Simultaneous Enhancement of the Luminescence Intensity and Stability of Deep-Red CsPbI 3 Perovskite Quantum Dots Achieved by a Doping Strategy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:11317-11328. [PMID: 37526360 DOI: 10.1021/acs.langmuir.3c01007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
The phase instability of CsPbI3 perovskite quantum dots (PQDs) restricts their practical applications due to the easy conversion from the luminescent cubic phase to the non-luminescent orthorhombic phase. The elemental doping route has been regarded as one of the most effective strategies to achieve high-quality PQDs-based phosphors. Herein, a stoichiometric amount of nickel chloride (NiCl2) has been effectively doped into the CsPbI3 lattice. The incorporation of Ni2+ ions has little effect on the crystal phase, structure, and morphology of the CsPbI3 PQDs but greatly influences their luminescence properties. The Ni2+ doping not only improves the luminescence performance but also greatly enhances the stability against temperature, storage time, and polar solvent. The formation process and luminescence and stability improvement mechanisms have been discussed. Moreover, the influence of a series of other metal chlorides (KCl, NaCl, MgCl2, ZnCl2, SnCl2, and CaCl2) on the luminescence performance of CsPbI3 PQDs has been systematically investigated, revealing that the luminescence intensity increases by introducing CaCl2, SnCl2, or ZnCl2 but decreases after doping MgCl2, NaCl, or KCl into the CsPbI3 lattice. The as-proposed doping strategy may have a significant impact on tackling the intrinsic instability of all-inorganic CsPbX3 PQDs, shedding light on their future applications in light-emitting diode (LED) devices and solid-state lighting.
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Affiliation(s)
- Jianru Wang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
| | - Cuimiao Zhang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
| | - Shuang Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
| | - Qile Guo
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
| | - Yunyu Bai
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
| | - Guang Jia
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
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7
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Zhang L, Li X, Song Y, Zou B. Ultrafast Antisolvent Growth of Single-Crystal CsPbBr 3 Microcavity for Whispering-Gallery-Mode Lasing. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2116. [PMID: 37513126 PMCID: PMC10384258 DOI: 10.3390/nano13142116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/11/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
In recent years, all-inorganic cesium lead bromide (CsPbBr3) perovskites have garnered considerable attention for their prospective applications in green photonics and optoelectronic devices. However, the development of efficient and economical methods to obtain high-quality micron-sized single-crystalline CsPbBr3 microplatelets (MPs) has become a challenge. Here, we report the synthesis of CsPbBr3 MPs on Si/SiO2 substrate by optimizing the ultrafast antisolvent method (FAS). This technique is able to produce well-dispersed, uniformly sized, and morphologically regular tetragonal phase single crystals, which can give strong green emission at room temperature, with excellent stability and excitonic character. Moreover, the crystals demonstrated lasing with a whispering gallery mode with a low threshold. These results suggest that the single-crystalline CsPbBr3 MPs synthesized by this method are of high optical quality, holding vast potential for future applications in photonic devices.
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Affiliation(s)
- Li Zhang
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Xinxin Li
- Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yimeng Song
- Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou 516001, China
| | - Bingsuo Zou
- State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured Materials, School of Resources, Environments and Materials, Guangxi University, Nanning 530004, China
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8
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Yang L, Huang J, Tan Y, Lu W, Li Z, Pan A. All-inorganic lead halide perovskite nanocrystals applied in advanced display devices. MATERIALS HORIZONS 2023; 10:1969-1989. [PMID: 37039776 DOI: 10.1039/d3mh00062a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Advanced display devices are in greater demand due to their large color gamut, high color purity, ultrahigh visual resolution, and small size pixels. All-inorganic lead halide perovskite (AILHP) nanocrystals (NCs) possess inherent advantages such as narrow emission width, saturated color, and flexible integration, and have been developed as functional films, light sources, backlight components, and display panels. However, some drawbacks still restrict the practical application of advanced display devices based on AILHP NCs, including working stability, large-scale synthesis, and cost. In this review, we focus on AILHP NCs, review the recent progress in materials synthesis, stability improvement, patterning techniques, and device application. We also highlight the important role of materials systems in creating advanced display devices, followed by the challenges and opportunities in industrial processes. This review provides beneficial inspiration for the future development of AILHP NCs in colorful and white backlight, as well as high resolution full-color displays.
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Affiliation(s)
- Liuli Yang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan Institute of Optoelectronic Integration, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Jianhua Huang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan Institute of Optoelectronic Integration, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Yike Tan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan Institute of Optoelectronic Integration, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Wei Lu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan Institute of Optoelectronic Integration, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China.
| | - Ziwei Li
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan Institute of Optoelectronic Integration, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China.
- Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan, China
| | - Anlian Pan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan Institute of Optoelectronic Integration, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China.
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9
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Wani T, Shamsi J, Bai X, Arora N, Dar MI. Advances in All-Inorganic Perovskite Nanocrystal-Based White Light Emitting Devices. ACS OMEGA 2023; 8:17337-17349. [PMID: 37251151 PMCID: PMC10210016 DOI: 10.1021/acsomega.3c00188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 04/25/2023] [Indexed: 05/31/2023]
Abstract
Metal halide perovskites (MHPs) are exceptional semiconductors best known for their intriguing properties, such as high absorption coefficients, tunable bandgaps, excellent charge transport, and high luminescence yields. Among various MHPs, all-inorganic perovskites exhibit benefits over hybrid compositions. Notably, critical properties, including chemical and structural stability, could be improved by employing organic-cation-free MHPs in optoelectronic devices such as solar cells and light-emitting devices (LEDs). Due to their enticing features, including spectral tunability over the entire visible spectrum with high color purity, all-inorganic perovskites have become a focus of intense research for LEDs. This Review explores and discusses the application of all-inorganic CsPbX3 nanocrystals (NCs) in developing blue and white LEDs. We discuss the challenges perovskite-based LEDs (PLEDs) face and the potential strategies adopted to establish state-of-the-art synthetic routes to obtain rational control over dimensions and shape symmetry without compromising the optoelectronic properties. Finally, we emphasize the significance of matching the driving currents of different LED chips and balancing the aging and temperature of individual chips to realize efficient, uniform, and stable white electroluminescence.
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Affiliation(s)
- Tajamul
A. Wani
- Department
of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Javad Shamsi
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
| | - Xinyu Bai
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
| | - Neha Arora
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
- Department
of Chemistry, University College London, London WC1H 0AJ, United Kingdom
| | - M. Ibrahim Dar
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
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10
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Zhou X, Chang Q, Xiang G, Jiang S, Li L, Tang X, Ling F, Wang Y, Li J, Wang Z, Zhang X. A and B sites dual substitution by Na + and Cu 2+ co-doping in CsPbBr 3 quantum dots to achieve bright and stable blue light emitting diodes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 300:122773. [PMID: 37244025 DOI: 10.1016/j.saa.2023.122773] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/06/2023] [Accepted: 04/21/2023] [Indexed: 05/29/2023]
Abstract
Light-emitting perovskite quantum dots (PeQDs) are extensively investigated owing to their evident merits. However, it is still a challenge to adjust their intrinsic emissions and enhance their thermal stability to achieve full-color highly emissive QD-based light-emitting diodes (QLEDs), especially blue QLEDs. Herein, we demonstrate an effective strategy to fundamentally stabilize the crystal structure of CsPbBr3 QDs by codoping Na+ and Cu2+ ions, which are designed to substitute Cs+ (A sites) and Pb2+ (B sites), respectively. It is found out that the codoping metal ions have significantly improved the thermal stability and the optical properties of the QDs. 40% of the emission intensity can be remained after 8 thermal cycles (20-120 °C) for CsPbBr3: Na+/Cu2+ QDs, whilst less than 10% is maintained for undoped CsPbBr3 QDs. Accordingly, stable blue QLEDs are packed by CsPbBr3: Na+/Cu2+ QDs. Strong electroluminescence with the maximum luminance of 7161 cd m-2 and low turn-on voltage of 2.4 V are realized. The CIE coordinates are tuned from green (0.10, 0.74) to blue (0.17, 0.25) via Na+ and Cu2+ codoping. The maximum external quantum efficiency (EQEmax) is obtained as 4.52% for PeLEDs based on codoped QDs. The proposed metal ions A and B sites dual substitution strategy guarantees PeQDs as an extremely promising prospect in potential applications as high-resolution displays and high-quality lightings.
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Affiliation(s)
- Xianju Zhou
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China.
| | - Qianyang Chang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Guotao Xiang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Sha Jiang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Li Li
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Xiao Tang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Faling Ling
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Yongjie Wang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Jingfang Li
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Zhen Wang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China.
| | - Xuecong Zhang
- Jiangsu AMICC Optoelectronics Technology Co., Ltd., Changzhou 213164, PR China.
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11
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Jang C, Kim K, Nho HW, Lee SM, Mubarok H, Han JH, Kim H, Lee D, Jang Y, Lee MH, Kwon OH, Kwak SK, Im WB, Song MH, Park J. Synthesis of Thermally Stable and Highly Luminescent Cs 5 Cu 3 Cl 6 I 2 Nanocrystals with Nonlinear Optical Response. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206668. [PMID: 36703517 DOI: 10.1002/smll.202206668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 12/19/2022] [Indexed: 06/18/2023]
Abstract
Low-dimensional Cu(I)-based metal halide materials are gaining attention due to their low toxicity, high stability and unique luminescence mechanism, which is mediated by self-trapped excitons (STEs). Among them, Cs5 Cu3 Cl6 I2 , which emits blue light, is a promising candidate for applications as a next-generation blue-emitting material. In this article, an optimized colloidal process to synthesize uniform Cs5 Cu3 Cl6 I2 nanocrystals (NCs) with a superior quantum yield (QY) is proposed. In addition, precise control of the synthesis parameters, enabling anisotropic growth and emission wavelength shifting is demonstrated. The synthesized Cs5 Cu3 Cl6 I2 NCs have an excellent photoluminescence (PL) retention rate, even at high temperature, and exhibit high stability over multiple heating-cooling cycles under ambient conditions. Moreover, under 850-nm femtosecond laser irradiation, the NCs exhibit three-photon absorption (3PA)-induced PL, highlighting the possibility of utilizing their nonlinear optical properties. Such thermally stable and highly luminescent Cs5 Cu3 Cl6 I2 NCs with nonlinear optical properties overcome the limitations of conventional blue-emitting nanomaterials. These findings provide insights into the mechanism of the colloidal synthesis of Cs5 Cu3 Cl6 I2 NCs and a foundation for further research.
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Affiliation(s)
- Changhee Jang
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Kangyong Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Hak-Won Nho
- Department of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
| | - Seung Min Lee
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Hanif Mubarok
- Department of Chemistry, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - Joo Hyeong Han
- Division of Materials Science and Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Hyeonjung Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Dongryeol Lee
- Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Yangpil Jang
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - Oh-Hoon Kwon
- Department of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
| | - Sang Kyu Kwak
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Won Bin Im
- Division of Materials Science and Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Myoung Hoon Song
- Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jongnam Park
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
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12
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Zhao Q, Chen F, Li C, Shang C, Huang Q, Yan B, Zhu H, Wang K, Zhang W, Zhou T, Ding J. Challenges and developments for the blue perovskite nanocrystal light-emitting diodes. Dalton Trans 2023; 52:3921-3941. [PMID: 36939177 DOI: 10.1039/d3dt00122a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Perovskite nanomaterials have been highly thought as next-generation light emitters after recent development owing to their benefits of simple synthesis, low-cost, large-area, and wide color gamut. Encouragingly, the external quantum efficiencies (EQEs) of green, red, and near-infrared perovskite light-emitting diodes (PeLEDs) have exceeded more than 20%. However, the performance of the blue PeLEDs is still lower than other analogs, which severely limits the applications of PeLEDs in future full-color displays. Herein, we have reviewed the advances in blue perovskite NCs and their applications in blue PeLEDs. Promising blue perovskite emitters and strategies for fabricating highly efficient blue PeLEDs based on perovskite NCs are investigated and highlighted. Moreover, we point out the main challenges in blue perovskite NC LEDs including low electroluminescence efficiency (EL), spectral instability, the difficulty of charge injection, and device optimization. The perspectives for the further development of blue PeLEDs are also presented.
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Affiliation(s)
- Qiqi Zhao
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Feitong Chen
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Changqian Li
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Chenyu Shang
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Qi Huang
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Bin Yan
- College of Energy Storage Technology, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Huiling Zhu
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Kunhua Wang
- College of Energy Storage Technology, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Weiwei Zhang
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Tianliang Zhou
- College of Materials, Xiamen University, Xiamen 361005, China.
| | - Jianxu Ding
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
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13
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Wu X, Wang J, Tang C, Li L, Chen W, Wu Z, Zhu J, Li T, Song H, Bai X. Synergistic regulation effect of magnesium and acetate ions on structural rigidity for synthesizing an efficient and robust CsPbI 3 perovskite toward red light-emitting devices. Dalton Trans 2023; 52:2175-2181. [PMID: 36723095 DOI: 10.1039/d2dt03816a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The structure of CsPbI3 nanocrystals (NCs) with excellent photoelectric properties easily collapses, which hinders their application in light-emitting diodes (LEDs). Herein, we accomplished the synthesis of efficient and stable CsPbI3 NCs by regulating structural rigidity under the synergistic effect of Mg2+ and AcO- ions. The introduced AcO- and Mg2+ ions increase surface steric hindrance and defect formation energy, which enhances the structural rigidity of the perovskite. As a result, the CsPbI3 NCs display an outstanding photoluminescence quantum yield of 95.7%, in conjunction with reduced defect state density, balanced carrier injection, and distinguished conductivity. Remarkably, the modified CsPbI3 NCs exhibit excellent stability under ambient conditions for 180 days and can even survive when the temperature reaches 150 °C. Given their enhanced structural rigidity, LEDs made from these modified CsPbI3 NCs exhibit a maximum luminance and an EQE of 3281 cd m-2 and 13.2%, respectively, which are significantly improved compared with those of unmodified CsPbI3 NC LEDs.
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Affiliation(s)
- Xiufeng Wu
- College of Physics, Liaoning University, Shenyang, China
| | - Jiwei Wang
- College of Physics, Liaoning University, Shenyang, China
| | - Chengyuan Tang
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Lifang Li
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Wenda Chen
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Zhennan Wu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Jinyang Zhu
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Tingting Li
- School of Materials Science and Engineering, Jilin Jianzhu University, Changchun, China.
| | - Hongwei Song
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Xue Bai
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
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14
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Yang Y, Li Y, Gong W, Guo H, Niu X. Cobalt-doped CsPbBr3 Perovskite Quantum Dots for Photoelectrocatalytic Hydrogen Production via Efficient Charge Transport. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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15
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Xia W, Ren Z, Zheng Z, Luo C, Li J, Ma W, Zhou X, Chen Y. Highly stable lanthanide-doped CsPbI 3 perovskite nanocrystals with near-unity quantum yield for efficient red light-emitting diodes. NANOSCALE 2023; 15:1109-1118. [PMID: 36594200 DOI: 10.1039/d2nr06317d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
CsPbI3 perovskite nanocrystals (NCs) are gaining popularity as promising photoactive materials for optoelectronic devices. However, their poor phase stability has caused substantial limitations in their practical application. Herein, the small-sized rare earth La cation is strategically introduced to fundamentally improve the NC phase stability against the environment, heat, and UV radiation by the partial substitution of Pb ions to suppress structural distortion and increase the formation energy. The strong interaction between La and I of the octahedra has been demonstrated to enable the effective suppression of the trap states, which promotes strengthened radiative recombination for a near-unity photoluminescence quantum yield (PLQY) of 99.3%. High energy bands have also been found for the La-doped NCs to narrow down the energy barrier for efficient hole injection. The superior optoelectronic properties of La-doped NCs promote great improvements in the perovskite light-emitting diode (PeLED) performances with a 5-fold improvement in external quantum efficiency (EQE) from 1.19 to 6.01% and 2-fold longer lifetime from 1451 to 2956 s. This work provides an effective method for small-sized metal ion-doped CsPbI3 NCs to realize high emission efficiency and phase stabilization for efficient PeLEDs.
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Affiliation(s)
- Wenlin Xia
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Zhenwei Ren
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Zhishuai Zheng
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Chengzhao Luo
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Jie Li
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Wenchen Ma
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Xin Zhou
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
| | - Yu Chen
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
- National University of Singapore Suzhou Research Institute, Dushu Lake Science and Education Innovation District, Suzhou 215123, China
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16
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Synthesis and Applications of Halide Perovskite Nanocrystals in Optoelectronics. INORGANICS 2023. [DOI: 10.3390/inorganics11010039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The perovskites used for optoelectronic devices have been more attractive during recent years due to their wide variety of advantages, such as their low cost, high photoluminescence quantum yield (PLQY), high carrier mobility, flexible bandgap tunability, and high light absorption ability. However, optoelectronic applications for traditional inorganic and organic materials present dilemmas due to their hardly tunable bandgap and instability. On the other hand, there are some more important benefits for perovskite nanocrystals, such as a size-dependent bandgap and the availability of anion exchange at room temperature. Therefore, perovskite NC-based applications are currently favored, offering a research direction beyond perovskite, and much research has focused on the stability issue and device performance. Thus, the synthesis and applications of perovskite NCs need to be thoroughly discussed for the future development of solar cells, light-emitting diodes, photodetectors, and laser research.
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17
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Gao L, Zhang Y, Gou L, Wang Q, Wang M, Zheng W, Wang Y, Yip HL, Zhang J. High efficiency pure blue perovskite quantum dot light-emitting diodes based on formamidinium manipulating carrier dynamics and electron state filling. LIGHT, SCIENCE & APPLICATIONS 2022; 11:346. [PMID: 36513629 PMCID: PMC9747997 DOI: 10.1038/s41377-022-00992-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 08/23/2022] [Accepted: 09/24/2022] [Indexed: 06/17/2023]
Abstract
Achieving high efficiency and stable pure blue colloidal perovskite quantum dot (QD) light-emitting diodes (LEDs) is still an enormous challenge because blue emitters typically exhibit high defect density, low photoluminescence quantum yield (PLQY) and easy phase dissociation. Herein, an organic cation composition modification strategy is used to synthesize high-performance pure blue perovskite quantum dots at room temperature. The synthesized FA-CsPb(Cl0.5Br0.5)3 QDs show a bright photoluminescence with a high PLQY (65%), which is 6 times higher than the undoped samples. In addition, the photophysical properties of the FA cation doping was deeply illustrated through carrier dynamics and first principal calculation, which show lower defects, longer lifetime, and more reasonable band gap structure than undoped emitters. Consequently, pure blue FA-CsPb(Cl0.5Br0.5)3 QDs light-emitting devices were fabricated and presented a maximum luminance of 1452 cd m-2, and an external quantum efficiency of 5.01 % with an emission at 474 nm. The excellent photoelectric properties mainly originate from the enhanced blue QDs emitter and effective charge injection and exciton radiation. Our finding underscores this easy and feasible room temperature doping approach as an alternative strategy to blue perovskite QD LED development.
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Affiliation(s)
- Long Gao
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun, 130012, China
| | - Yilin Zhang
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun, 130012, China
| | - Lijie Gou
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun, 130012, China
| | - Qian Wang
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun, 130012, China
| | - Meng Wang
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun, 130012, China
| | - Weitao Zheng
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun, 130012, China
| | - Yinghui Wang
- Femtosecond Laser laboratory, Key Laboratory of Physics and Technology for Advanced Batteries, Ministry of Education, College of Physics, Jilin University, Changchun, 130012, China
| | - Hin-Lap Yip
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, China.
- School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong, China.
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, Hong Kong, China.
| | - Jiaqi Zhang
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun, 130012, China.
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18
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Hu Y, Cao S, Qiu P, Yu M, Wei H. All-Inorganic Perovskite Quantum Dot-Based Blue Light-Emitting Diodes: Recent Advances and Strategies. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4372. [PMID: 36558224 PMCID: PMC9781770 DOI: 10.3390/nano12244372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/02/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Light-emitting diodes (LEDs) based on all-inorganic lead halide perovskite quantum dots (PQDs) have undergone rapid development especially in the past five years, and external quantum efficiencies (EQEs) of the corresponding green- and red-emitting devices have exceeded 23%. However, the blue-emitting devices are facing greater challenges than their counterparts, and their poor luminous efficiency has hindered the display application of PQD-based LEDs (PeQLEDs). This review focuses on the key challenges of blue-emitting PeQLEDs including low EQEs, short operating lifetime, and spectral instability, and discusses the essential mechanism by referring to the latest research. We then systematically summarize the development of preparation methods of blue emission PQDs, as well as the current strategies on alleviating the poor device performance involved in composition engineering, ligand engineering, surface/interface engineering, and device structural engineering. Ultimately, suggestions and outlooks are proposed around the major challenges and future research direction of blue PeQLEDs.
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Affiliation(s)
- Yuyu Hu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto–Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Shijie Cao
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto–Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Peng Qiu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto–Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Meina Yu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Huiyun Wei
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto–Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, Wenzhou Institute of Biomaterials & Engineering, University of Chinese Academy of Sciences, Wenzhou 325027, China
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19
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Cho Y, Kim H, Lee S, Lee E, Hwang Y, Kim H, Seo S, Tran NQ, Kim WB, Jung HS, Kim J, Jeong MS, Lee H. Inductive Effect of Lewis Acidic Dopants on the Band Levels of Perovskite for a Photocatalytic Reaction. ACS APPLIED MATERIALS & INTERFACES 2022; 14:53603-53614. [PMID: 36404762 DOI: 10.1021/acsami.2c11936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Band-edge modulation of halide perovskites as photoabsorbers plays significant roles in the application of photovoltaic and photochemical systems. Here, Lewis acidity of dopants (M) as the new descriptor of engineering the band-edge position of the perovskite is investigated in the gradiently doped perovskite along the core-to-surface (CsPbBr3-CsPb1-xMxBr3). Reducing M-bromide bond strength with an increase in hardness of acidic M increases the electron ability of basic Br, thus strengthening the Pb-Br orbital coupling in M-Pb-Br, noted as the inductive effect of dopants. Especially, the highly hard Lewis acidic Mg localized in the outer position of the perovskite induces the increase of work function and then shifts band edge upward along the core-to-surface of the perovskite. Thus, charge separation driven by the dopant-induced internal electric field induces the slow annihilation of the excited holes, improving the slow aromatic Csp3-H dissociation in the photocatalytic oxidation process by ∼211% (491.39 μmol g-1 h-1) enhancements, compared with undoped nanocrystals.
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Affiliation(s)
- Yunhee Cho
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Hyojung Kim
- Artificial Atom and Quantum Materials Center, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Sanggil Lee
- Center for Research Equipment, Division of Scientific Instrumentation & Management, Korea Basic Science Institute, Gwahak-ro, Yuseong-gu, Daejeon34133, Republic of Korea
| | - Eunji Lee
- Department of Energy Science, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Yosep Hwang
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Hyunjung Kim
- Creative Research Institute, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Sohyeon Seo
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Creative Research Institute, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Ngoc Quang Tran
- Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Won Bin Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Hyun Suk Jung
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Jeongyong Kim
- Department of Energy Science, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Mun Seok Jeong
- Department of Energy Engineering, Hanyang University, Seoul04763, Republic of Korea
| | - Hyoyoung Lee
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Creative Research Institute, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Department of Biophysics, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
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20
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Silica-coated CsPbBr3 nanocrystals with high stability for bright white-emitting displays. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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21
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Zhu H, Tong G, Li J, Xu E, Tao X, Sheng Y, Tang J, Jiang Y. Enriched-Bromine Surface State for Stable Sky-Blue Spectrum Perovskite QLEDs With an EQE of 14.6. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2205092. [PMID: 35906787 DOI: 10.1002/adma.202205092] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Halogen vacancies are of great concern in blue-emitting perovskite quantum-dot light-emitting diodes because they affect their efficiency and spectral shift. Here, an enriched-bromine surface state is realized using a facile strategy that employs a PbBr2 stock solution for anion exchange based on Cd-doped perovskite quantum dots. It is found that the doped Cd ions are expected to reduce the formation energy of halogen vacancies filled by the external bromine ions, and the excess free bromine ions in solution are enriched in the surface by anchoring with halogen vacancies as sites, accompanied with the shedding of surface long-chain ligands during the anion exchange process, resulting in a Br-rich and "neat" surface. Moreover, the surface state exhibits good passivation of the surface defects of the controlled perovskite QDs and simultaneously increases the exciton binding energy, leading to excellent optical properties and stability. Finally, the sky-blue emitting perovskite quantum-dot light-emitting diodes (QLEDs) (490 nm) are conducted with a record external quantum efficiency of 14.6% and current efficiency of 19.9 cd A-1 . Meanwhile, the electroluminescence spectra exhibit great stability with negligible shifts under a constant operating voltage from 3 to 7 V. This strategy paves the way for improving the efficiency and stability of perovskite QLEDs.
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Affiliation(s)
- Hanwen Zhu
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Guoqing Tong
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Junchun Li
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Enze Xu
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Xuyong Tao
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Yuanyuan Sheng
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Jianxin Tang
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
| | - Yang Jiang
- School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
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22
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Challenges and Opportunities for the Blue Perovskite Quantum Dot Light-Emitting Diodes. CRYSTALS 2022. [DOI: 10.3390/cryst12070929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Perovskite quantum dots (PQDs), as the promising materials for the blue light-emitting diodes (LEDs), own huge advantages as ultra-high color purity, flexibility and whole-spectrum tunability. Through dimensional and compositional engineering, PQD-LEDs have shown superiority in deep-blue light emission. However, compared with the fast development of red and green PeLEDs, the electroluminescent performance of PQD-LEDs has faced more obstacles. In this review, we aim to explore and state the uniqueness and the possible solutions for the bottleneck problems of the PQD-LEDs.
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23
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Ren X, Zhang X, Xie H, Cai J, Wang C, Chen E, Xu S, Ye Y, Sun J, Yan Q, Guo T. Perovskite Quantum Dots for Emerging Displays: Recent Progress and Perspectives. NANOMATERIALS 2022; 12:nano12132243. [PMID: 35808081 PMCID: PMC9268187 DOI: 10.3390/nano12132243] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 06/23/2022] [Accepted: 06/27/2022] [Indexed: 02/04/2023]
Abstract
The excellent luminescence properties of perovskite quantum dots (PQDs), including wide excitation wavelength range, adjustable emission wavelength, narrow full width at half maximum (FWHM), and high photoluminescence quantum yield (PLQY), highly match the application requirements in emerging displays. Starting from the fundamental structure and the related optical properties, this paper first introduces the existing synthesis approaches of PQDs that have been and will potentially be used for display devices, and then summarizes the stability improving approaches with high retention of PQDs’ optical performance. Based on the above, the recent research progress of PQDs in displays is further elaborated. For photoluminescent display applications, the PQDs can be embedded in the backlighting device or color filter for liquid crystal displays (LCD), or they may function as the color conversion layer for blue organic light-emitting diodes (OLED) and blue micro-scale light-emitting diodes (μLED). In terms of next-generation electroluminescent displays, notable progress in perovskite quantum-dot light emitting diodes (PeQLED) has been achieved within the past decade, especially the maximum external quantum efficiency (EQE). To conclude, the key directions for future PQD development are summarized for promising prospects and widespread applications in display fields.
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Affiliation(s)
- Xinxin Ren
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
| | - Xiang Zhang
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
| | - Hongxing Xie
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, 2 Xueyuan Road, Fuzhou 350108, China
| | - Junhu Cai
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
| | - Chenhui Wang
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
| | - Enguo Chen
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, 2 Xueyuan Road, Fuzhou 350108, China
- Correspondence: ; Tel.: +86-13599399819
| | - Sheng Xu
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, 2 Xueyuan Road, Fuzhou 350108, China
| | - Yun Ye
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, 2 Xueyuan Road, Fuzhou 350108, China
| | - Jie Sun
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, 2 Xueyuan Road, Fuzhou 350108, China
| | - Qun Yan
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, 2 Xueyuan Road, Fuzhou 350108, China
| | - Tailiang Guo
- National & Local United Engineering Laboratory of Flat Panel Display Technology, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China; (X.R.); (X.Z.); (H.X.); (J.C.); (C.W.); (S.X.); (Y.Y.); (J.S.); (Q.Y.); (T.G.)
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, 2 Xueyuan Road, Fuzhou 350108, China
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Zhou X, Tong X, Li X, Min Y, Qian Y. Synergistic effect of indium doping and chlorine surface passivation on CsPbI 3 perovskite quantum dots for deep-red light-emitting devices. OPTICS LETTERS 2022; 47:3047-3050. [PMID: 35709046 DOI: 10.1364/ol.458017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
Deep-red CsPbI3 perovskite quantum dots (PeQDs) are essential for high-efficiency perovskite light-emitting diodes (PeLEDs) because of their high color purity and high photoluminescence quantum yield (PLQY). The synergetic strategy of indium (In) doping and chlorine (Cl) surface passivation not only partially replaced Pb2+ ions with the smaller ionic In3+ but also filled I- vacancies by Cl- on the surface, maintaining the humidity stability for more than 24 days and yielding excellent PLQY. Benefiting from this synergetic strategy, deep-red (approximately at 683 nm) CsPbI3 PeLEDs showed a maximum luminance and external quantum efficiency (EQE) of 311 cd m-2 and 8.32%, respectively.
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25
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Chakraborty S, Mandal P, Viswanatha R. Photoluminescence Quenching in CsPbCl 3 upon Fe Doping: Colloidal Synthesis, Structural and Optical Properties. Chem Asian J 2022; 17:e202200478. [PMID: 35696351 DOI: 10.1002/asia.202200478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/13/2022] [Indexed: 11/06/2022]
Abstract
Doped perovskite lead halide nanocrystals (PHNCs) are promising materials for various optoelectronic applications, but the major challenge faced by the researchers is the inability to dope foreign elements into perovskite lattice because of the strong lead-halide bond energies. In this work, we have used Fe as a dopant in CsPbCl3 to explore different doping techniques based on the colloidal synthesis of PHNCs to investigate the advantages and disadvantages of different techniques. We are able to dope a relatively higher amount of Fe (∼10%) than reported and observe clear optical signatures when the precursor does not have pre-existing Pb-Cl bonds. We prove that there are two competing processes inside a doped PHNC - one is the effect of dopant energy levels, and the other is surface passivation by halide ions. Using the most optimal synthesis strategy, we show that although Fe does act as a luminescence quencher in perovskite similar to II-VI quantum dots (QDs), the quenching requires much more Fe compared to trace amounts of Fe required in traditional QDs. Our work will assist in giving an overall comparative idea of doping and finding the most optimized strategy and help identify the underlying physical processes in perovskite based QDs.
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Affiliation(s)
- Saptarshi Chakraborty
- New Chemistry Unit, bInternational Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, 560064, India
| | - Prasenjit Mandal
- New Chemistry Unit, bInternational Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, 560064, India
| | - Ranjani Viswanatha
- New Chemistry Unit, bInternational Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, 560064, India
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26
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Ma YY, Fu HQ, Liu XL, Sun YM, Zhong QQ, Xu WJ, Lei XW, Liu GD, Yue CY. Zero-Dimensional Organic–Inorganic Hybrid Indium Chlorides with Intrinsic Blue Light Emissions. Inorg Chem 2022. [DOI: 10.1021/acs.inorgchem.2c00518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yue-Yu Ma
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, People’s Republic of China
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, People’s Republic of China
| | - Han-Qi Fu
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, People’s Republic of China
| | - Xue-Lei Liu
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, People’s Republic of China
| | - Yu-Ming Sun
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, People’s Republic of China
| | - Qian-Qian Zhong
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, People’s Republic of China
| | - Wen-Jie Xu
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, People’s Republic of China
| | - Xiao-Wu Lei
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, People’s Republic of China
| | - Guo-Dong Liu
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, People’s Republic of China
| | - Cheng-Yang Yue
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, People’s Republic of China
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27
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Jiang MC, Pan CY. Research on the stability of luminescence of CsPbBr 3 and Mn:CsPbBr 3 PQDs in polar solution. RSC Adv 2022; 12:15420-15426. [PMID: 35693234 PMCID: PMC9121214 DOI: 10.1039/d2ra02165j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 04/15/2022] [Indexed: 11/25/2022] Open
Abstract
Mn:CsPbBr3 PQDs are achieved by hot injection method. As the amount of Mn doping is gradually increased, the photoluminescence (PL) spectra shows a slight blue shift. Mn-doped PQDs exhibit higher quantum efficiency of 83.9% and longer lifetimes of 267 ns. The stability test was performed to assess the susceptibility of the PQDs to polar solutions. It was figured out that although the stabilities of CsPbBr3 PQDs and Mn-doped PQDs decreased as the polarity of solution increased, Mn-doped PQDs still maintained higher PL intensity than undoped PQD. Notably, 73% PL intensity of Mn:PQDs was maintained which is nearly three times as much as undoped PQDs in water. We found polarity would induce drastic degradation of CsPbBr3 QDs. The steady-state spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD) verified that CsPbBr3 QDs tend to aggregate to form larger particles under continuous light soaking. Our work reveals the main origin of instability in CsPbBr3 QDs and provides reference to engineering such QDs towards optimal device application. Mn-doped PQDs exhibit higher quantum efficiency of 83.9%. The stabilities of CsPbBr3 PQDs and Mn-doped PQDs decreased as the polarity of solution increased, but Mn-doped PQDs still maintained higher PL intensity than undoped PQDs.![]()
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Affiliation(s)
- Mou-Ce Jiang
- School of Light Industry and Chemical Engineering, Guangdong University of Technology Guangzhou Guangdong 510006 China +86-020-39322231
| | - Chun-Yang Pan
- School of Light Industry and Chemical Engineering, Guangdong University of Technology Guangzhou Guangdong 510006 China +86-020-39322231
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28
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Liu Y, Li Z, Xu J, Dong Y, Chen B, Park SM, Ma D, Lee S, Huang JE, Teale S, Voznyy O, Sargent EH. Wide-Bandgap Perovskite Quantum Dots in Perovskite Matrix for Sky-Blue Light-Emitting Diodes. J Am Chem Soc 2022; 144:4009-4016. [PMID: 35192324 DOI: 10.1021/jacs.1c12556] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The epitaxial growth of a perovskite matrix on quantum dots (QDs) has enabled the emergence of efficient red light-emitting diodes (LEDs) because it unites efficient charge transport with strong surface passivation. However, the synthesis of wide-band gap (Eg) QD-in-matrix heterostructures has so far remained elusive in the case of sky-blue LEDs. Here, we developed CsPbBr3 QD-in-perovskite matrix solids that enable high luminescent efficiency and spectral stability with an optical Eg of over 2.6 eV. We screened alloy candidates that modulate the perovskite Eg and allow heteroepitaxy, seeking to implement lattice-matched type-I band alignment. Specifically, we introduced a CsPb1-xSrxBr3 matrix, in which alloying with Sr2+ increased the Eg of the perovskite and minimized lattice mismatch. We then developed an approach to passivation that would overcome the hygroscopic nature of Sr2+. We found that bis(4-fluorophenyl)phenylphosphine oxide strongly coordinates with Sr2+ and provides steric hindrance to block H2O, a finding obtained by combining molecular dynamics simulations with experimental results. The resulting QD-in-matrix solids exhibit enhanced air- and photo-stability with efficient charge transport from the matrix to the QDs. LEDs made from this material exhibit an external quantum efficiency of 13.8% and a brightness exceeding 6000 cd m-2.
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Affiliation(s)
- Yuan Liu
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - Ziliang Li
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - Jian Xu
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - Yitong Dong
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - Bin Chen
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - So Min Park
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - Dongxin Ma
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - Seungjin Lee
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - Jianan Erick Huang
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - Sam Teale
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
| | - Oleksandr Voznyy
- Department of Physical and Environmental Sciences, University of Toronto, Scarborough, 1065 Military Trail, Toronto M1C 1A4, Ontario, Canada
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto M5S 1A4, Ontario, Canada
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29
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Padhiar MA, Wang M, Ji Y, Yang Z, Bhatti AS. Tuning optical properties of CsPbBr 3by mixing Nd 3+trivalent lanthanide halide cations for blue light emitting devices. NANOTECHNOLOGY 2022; 33:175202. [PMID: 35026753 DOI: 10.1088/1361-6528/ac4b2e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
In recent years, significant progress has been made in the red and green perovskite quantum dots (PQDs) based light-emitting devices. However, a scarcity of blue-emitting devices that are extremely efficient precludes their research and development for optoelectronic applications. Taking advantage of tunable bandgaps of PQDs over the entire visible spectrum, herein we tune optical properties of CSPbBr3by mixing Nd3+trivalent lanthanide halide cations for blue light-emitting devices. The CsPbBr3PQDs doped with Nd3+trivalent lanthanide halide cations emitted strong photoemission from green into the blue region. By adjusting their doping concentration, a tunable wavelength from (515 nm) to (450 nm) was achieved with FWHM from (37.83 nm) to (16.6 nm). We simultaneously observed PL linewidth broadening thermal quenching of PL and the blue shift of the optical bandgap from temperature-dependent PL studies. The Nd3+cations into CsPbBr3PQDs more efficiently reduced non-radiative recombination. As a result of the efficient removal of defects from PQDs, the photoluminescence quantum yield (PLQY) has been significantly increased to 91% in the blue-emitting region. Significantly, Nd3+PQDs exhibit excellent long-term stability against the external environment, including water, temperature, and ultraviolet light irradiation. Moreover, we successfully transformed Nd3+doped PQDs into highly fluorescent nanocomposites. Incorporating these findings, we fabricate and test a stable blue light-emitting LED with EL emission at (462 nm), (475 nm), and successfully produce white light emission from Nd3+doped nanocomposites with a CIE at (0.32, 0.34), respectively. The findings imply that low-cost Nd3+doped perovskites may be attractive as light converters in LCDs with a broad color gamut.
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Affiliation(s)
- Muhammad Amin Padhiar
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Centre for Dielectric Research & Shaanxi Engineering Research Centre of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Minqiang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Centre for Dielectric Research & Shaanxi Engineering Research Centre of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Yongqiang Ji
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Centre for Dielectric Research & Shaanxi Engineering Research Centre of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Zhi Yang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Centre for Dielectric Research & Shaanxi Engineering Research Centre of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Arshad Saleem Bhatti
- Center for Micro and Nano Device, Department of Physics, COMSATS Institute of Information Technology, Islamabad 44500, Pakistan
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30
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Kim H, Park JH, Kim K, Lee D, Song MH, Park J. Highly Emissive Blue Quantum Dots with Superior Thermal Stability via In Situ Surface Reconstruction of Mixed CsPbBr 3 -Cs 4 PbBr 6 Nanocrystals. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104660. [PMID: 34957694 PMCID: PMC8844471 DOI: 10.1002/advs.202104660] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Indexed: 06/07/2023]
Abstract
Although metal halide perovskites are candidate high-performance light-emitting diode (LED) materials, blue perovskite LEDs are problematic: mixed-halide materials are susceptible to phase segregation and bromide-based perovskite quantum dots (QDs) have low stability. Herein, a novel strategy for highly efficient, stable cesium lead bromide (CsPbBr3 ) QDs via in situ surface reconstruction of CsPbBr3 -Cs4 PbBr6 nanocrystals (NCs) is reported. By controlling precursor reactivity, the ratio of CsPbBr3 to Cs4 PbBr6 NCs is successfully modulated. A high photoluminescence quantum yield (PLQY) of >90% at 470 nm is obtained because octahedron CsPbBr3 QD surface defects are removed by the Cs4 PbBr6 NCs. The defect-engineered QDs exhibit high colloidal stability, retaining >90% of their initial PLQY after >120 days of ambient storage. Furthermore, thermal stability is demonstrated by a lack of heat-induced aggregation at 120 °C. Blue LEDs fabricated from CsPbBr3 QDs with reconstructed surfaces exhibit a maximum external quantum efficiency of 4.65% at 480 nm and excellent spectral stability.
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Affiliation(s)
- Hyeonjung Kim
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Jong Hyun Park
- Department of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Kangyong Kim
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Dongryeol Lee
- Department of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Myoung Hoon Song
- Department of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
| | - Jongnam Park
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
- Department of Biomedical EngineeringUlsan National Institute of Science and Technology (UNIST)UNIST‐gil 50Ulsan44919Republic of Korea
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31
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Li X, Tong Z, Lyu W, Chen X, Yang X, Zhang Y, Liu S, Dai Y, Zhang Z, Guo C, Xu J. Underwater quasi-omnidirectional wireless optical communication based on perovskite quantum dots. OPTICS EXPRESS 2022; 30:1709-1722. [PMID: 35209331 DOI: 10.1364/oe.448213] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 12/24/2021] [Indexed: 06/14/2023]
Abstract
In this paper, a quasi-omnidirectional transmitter is proposed and demonstrated for underwater wireless optical communication (UWOC) using the photoluminescence of perovskite quantum dots (QDs). The proposed transmitter, without complex driving circuits, is compact and reliable thanks to the lens-free design. The system performance is tested in a 50-m swimming pool with a water attenuation coefficient of 0.38 dB/m. The maximum data rates of on-off-keying (OOK) signals over 10-m and 20-m transmission distances can reach 60 Mbps and 40 Mbps, respectively. When four clients are adopted in a code division multiple access (CDMA) based UWOC network, the maximum data rates of each client can reach 10 Mbps and 7.5 Mbps over 10-m and 20-m underwater channels, respectively. The system can meet the requirements of the last meter end-user access in the Internet of underwater things (IoUT) and underwater optical cellular network systems.
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32
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Getachew G, Korupalli C, Rasal AS, Dirersa WB, Fahmi MZ, Chang JY. Highly Luminescent, Stable, and Red-Emitting CsMg xPb 1-xI 3 Quantum Dots for Dual-Modal Imaging-Guided Photodynamic Therapy and Photocatalytic Activity. ACS APPLIED MATERIALS & INTERFACES 2022; 14:278-296. [PMID: 34962372 DOI: 10.1021/acsami.1c19644] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this study, for the first time, red-emitting CsMgxPb1-xI3 quantum dots (QDs) are prepared by doping with magnesium (Mg) ions via the one-pot microwave pyrolysis technique. The X-ray diffraction and X-ray photoelectron spectroscopy results have confirmed partial substitution of Pb2+ by Mg2+ inside the CsPbI3 framework. The as-synthesized CsMgxPb1-xI3 QDs have exhibited excellent morphology, higher quantum yield (upto ∼89%), better photostability and storage stability than undoped CsPbI3. Next, the bioavailability of as-synthesized hydrophobic CsMgxPb1-xI3 QDs is improved by encapsulating them into gadolinium-conjugated pluronic 127 (PF127-Gd) micelles through hydrophobic interactions (PQD@Gd). The optical properties of perovskite quantum dots (PQDs) and the presence of Gd could endow the PQD@Gd with fluorescence imaging, magnetic resonance imaging (MRI), and phototherapeutic properties. Accordingly, the MRI contrasting effects of PQD@Gd nanoagents are demonstrated by employing T1 and T2 studies, which validated that PQD@Gd nanoagents had superior MR contrasting effect with a r2/r1 ratio of 1.38. In vitro MRI and fluorescence imaging analyses have shown that the PQD@Gd nanoagents are internalized into the cancer cells via a caveolae-mediated endocytosis pathway. The PQD@Gd nanoagents have exhibited excellent biocompatibility even at concentrations as high as 450 ppm. Interestingly, the as-prepared PQD@Gd nanoagents have efficiently produced cytotoxic reactive oxygen species in the cancer cells under 671 nm laser illumination and thereby induced cell death. Moreover, the PQD@Gd nanoagent also demonstrated excellent photocatalytic activity toward organic pollutants under visible light irradiation. The organic pollutants rhodamine b, methyl orange, and methylene blue were degraded by 92.11, 89.21, and 76.21%, respectively, under 60, 80, and 100 min, respectively, irradiation time. The plausible mechanism for the photocatalytic activity is also elucidated. Overall, this work proposes a novel strategy to enhance the optical properties, stability, and bioapplicability of PQDs. The multifunctional PQD@Gd nanoagents developed in this study could be the potential choice of components not only for cancer therapy due to dual-modal imaging and photodynamic therapeutic properties but also for organic pollutant or bacterial removal due to excellent photocatalytic properties.
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Affiliation(s)
- Girum Getachew
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan, Republic of China
| | - Chiranjeevi Korupalli
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan, Republic of China
| | - Akash S Rasal
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan, Republic of China
| | - Worku Batu Dirersa
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan, Republic of China
| | - Mochamad Z Fahmi
- Department of Chemistry, Universitas Airlangga, Surabaya 60115, Indonesia
| | - Jia-Yaw Chang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan, Republic of China
- Taiwan Building Technology Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan, Republic of China
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33
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Improved One- and Multiple-Photon Excited Photoluminescence from Cd 2+-Doped CsPbBr 3 Perovskite NCs. NANOMATERIALS 2022; 12:nano12010151. [PMID: 35010101 PMCID: PMC8746976 DOI: 10.3390/nano12010151] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/27/2021] [Accepted: 12/29/2021] [Indexed: 02/04/2023]
Abstract
Metal halide perovskite nanocrystals (NCs) attract much attention for light-emitting applications due to their exceptional optical properties. More recently, perovskite NCs have begun to be considered a promising material for nonlinear optical applications. Numerous strategies have recently been developed to improve the properties of metal halide perovskite NCs. Among them, B-site doping is one of the most promising ways to enhance their brightness and stability. However, there is a lack of study of the influence of B-site doping on the nonlinear optical properties of inorganic perovskite NCs. Here, we demonstrate that Cd2+ doping simultaneously improves both the linear (higher photoluminescence quantum yield, larger exciton binding energy, reduced trap states density, and faster radiative recombination) and nonlinear (higher two- and three-photon absorption cross-sections) optical properties of CsPbBr3 NCs. Cd2+ doping results in a two-photon absorption cross-section, reaching 2.6 × 106 Goeppert-Mayer (GM), which is among the highest reported for CsPbBr3 NCs.
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He H, Mei S, Wen Z, Yang D, Yang B, Zhang W, Xie F, Xing G, Guo R. Recent Advances in Blue Perovskite Quantum Dots for Light-Emitting Diodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2103527. [PMID: 34713966 DOI: 10.1002/smll.202103527] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/22/2021] [Indexed: 06/13/2023]
Abstract
Metal halide perovskite nanostructures have sparked intense research interest due to their excellent optical properties. In recent years, although the green and red perovskite light-emitting diodes (PeLEDs) have achieved a significant breakthrough with the external quantum efficiency exceeding 20%, the blue PeLEDs still suffer from inferior performance. Previous reviews about blue PeLEDs focus more on 2D/quasi-2D or 3D perovskite materials. To develop more stable and efficient blue PeLEDs, a systematic review of blue perovskite quantum dots (PQDs) is urgently demanded to clarify how PQDs evolve. In this review, the recent advances in blue PQDs involving mixed-halide, quantum-confined all-bromide, metal-doped and lead-free PQDs as well as their applications in PeLEDs are highlighted. Although several excellent PeLEDs based on these PQDs have been demonstrated, there are still many problems to be solved. A deep insight into the advantages and disadvantages of these four types of blue-emitting PQDs is provided. Then, their respective potential and issues for blue PeLEDs have been discussed. Finally, the challenges and outlook for efficient and stable blue PeLEDs based on PQDs are addressed.
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Affiliation(s)
- Haiyang He
- Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai, 200433, China
| | - Shiliang Mei
- Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, 999078, China
| | - Zhuoqi Wen
- Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai, 200433, China
| | - Dan Yang
- Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai, 200433, China
| | - Bobo Yang
- Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai, 200433, China
| | - Wanlu Zhang
- Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai, 200433, China
| | - Fengxian Xie
- Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai, 200433, China
| | - Guichuan Xing
- Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, 999078, China
| | - Ruiqian Guo
- Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai, 200433, China
- Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai, 200433, China
- Zhongshan-Fudan Joint Innovation Center, Zhongshan, 528437, China
- Yiwu Research Institute of Fudan University, Chengbei Road, Yiwu City, Zhejiang, 322000, China
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Wu X, Hu S, Shao H, Li L, Chen W, Dong B, Xu L, Xu W, Zhou D, Wu Z, Song H, Bai X. Introducing ytterbium acetate to luminescent CsPbCl3 nanocrystals for enhanced sensitivity of Cu2+ detection. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01235e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Yb(OAc)3 promoted the formation of CsPbCl3 nanowires (NWs). The NWs exhibited boost in conductivity and the adsorbed AcO− on the surface of NWs enhanced the adsorption capacity of Cu2+, which enabled NWs with high detection sensitivity of Cu2+.
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Affiliation(s)
- Xiufeng Wu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Songtao Hu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - He Shao
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Lifang Li
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Wenda Chen
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Biao Dong
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Lin Xu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Wen Xu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Donglei Zhou
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Zhennan Wu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Hongwei Song
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Xue Bai
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
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Wang X, Niu C, Liao W, Mei S, Hu R, Li Y, Yang B, Chen Y, Zou J. A novel material Cs 2Rb xAg 1−xIn 0.875Bi 0.125Cl 6 with a special blue shift and application for white light LED devices. Phys Chem Chem Phys 2022; 24:25434-25439. [DOI: 10.1039/d2cp03526j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A lead-free perovskite of Cs2RbxAg1−xIn0.875Bi0.125Cl6 was synthesized by a hydrothermal method. Properties were characterized in detail and a LED device package was developed with desirable performance promising for lighting applications.
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Affiliation(s)
- Xixiang Wang
- School of Chemistry and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Chen Niu
- School of Science, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Wenjian Liao
- School of Chemistry and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Shiliang Mei
- Institute for Electric Light Sources, Fudan University, Shanghai, 200433, People's Republic of China
| | - Rongrong Hu
- School of Science, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Yang Li
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Bobo Yang
- School of Science, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Yong Chen
- School of Chemistry and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Jun Zou
- School of Science, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
- National Semiconductor Lighting Application System Engineering Technology Research Center, Shanghai, 201418, People's Republic of China
- Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou, 325024, People's Republic of China
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Liu D, Liu X, Sun G, Meng F, Liu Z, Shen C, Li M, Su SJ. Efficient Zn-Alloyed Low-Toxicity Quasi-Two-Dimensional Pure-Red Perovskite Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:55412-55419. [PMID: 34756020 DOI: 10.1021/acsami.1c16242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Metal halide perovskites have attracted extensive attention in next-generation solid-state lighting and displays due to their fascinating optoelectronic properties. However, the toxicity of lead (Pb) impedes their practical application. Herein, we report an efficient Zn-alloyed quasi-two-dimensional (quasi-2D) pure-red perovskite light-emitting device (PeLED) by introducing zinc ions (Zn2+) into the perovskite lattice and partially substituting Pb2+. The substitution of Zn2+ is confirmed by X-ray diffraction, X-ray photoelectron spectroscopy, grazing-incidence wide-angle X-ray scattering, and transmission electron microscopy measurements. In addition, the vacancy defect density of Pb and the halogen is reduced by the introduction of Zn2+ in the PEA2(Cs0.3MA0.7)2(ZnxPb1-x)3I10 perovskite system, which leads to a more ordered crystal orientation, compact morphology, and increased photoluminescence quantum efficiency. Benefiting from the improved photoelectric properties, a maximum EQE of 9.5% and a luminescence of 453 cd m-2 are achieved for the Zn-alloyed PeLEDs, with a maximum emission peak of 658 nm and stable electroluminescence spectra under various applied biases.
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Affiliation(s)
- Denghui Liu
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou 510640, China
| | - Xinyan Liu
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou 510640, China
| | - Guanwei Sun
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou 510640, China
| | - Fanyuan Meng
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou 510640, China
| | - Zhe Liu
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou 510640, China
| | - Chenyang Shen
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou 510640, China
| | - Mengke Li
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou 510640, China
| | - Shi-Jian Su
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou 510640, China
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Gao L, Cheng T, Wang Q, Gou L, Zhang Y, Zhang X, Tan CH, Zheng W, McLachlan MA, Zhang J. Color-Stable and High-Efficiency Blue Perovskite Nanocrystal Light-Emitting Diodes via Monovalent Copper Ion Lowering Lead Defects. ACS APPLIED MATERIALS & INTERFACES 2021; 13:55380-55390. [PMID: 34783246 DOI: 10.1021/acsami.1c18041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Light-emitting diodes using metal halide perovskite (PeLEDs) exhibit a strong potential for emerging display technologies due to their unique optoelectronic characteristics. However, for blue emission PeLEDs, there remains a huge challenge to achieve high performance, an issue that has been addressed in their red and green counterparts. The community is circumventing the challenges in synthesizing stable, high-quantum-efficiency, and low-defect-density blue emitters. Here, a facile strategy that replaces Pb by adding a monovalent ion Cu+, in this case into CsPbClBr2 perovskite, is carried out. This decreases the Pb dangling bonds and increases the radiative recombination for the enhancement of blue emission. The nanoparticles obtained by this method maintain a blue emission at 479 nm. The photoluminescence quantum yield is 2 times higher than the pristine analogue. The corresponding perovskite nanocrystal (PNC) LEDs achieve stable electroluminescence spectrum at high brightness. Simultaneously, the optimal blue PNC LEDs obtain the maximum values of luminance and external quantum efficiency of 1537 cd m-2 and 3.78%, respectively. And the device realizes typical blue light CIE chromaticity coordinates of (0.098, 0.123). Our work reveals that the substitution of Pb by heterovalent ions significantly decreases nanocrystal defects, which will pave the way of perovskite LEDs for practical applications in the future.
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Affiliation(s)
- Long Gao
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130012, China
| | - Tuo Cheng
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130012, China
| | - Qian Wang
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130012, China
| | - Lijie Gou
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130012, China
| | - Yilin Zhang
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130012, China
| | - Xiaoyu Zhang
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130012, China
| | - Ching-Hong Tan
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Weitao Zheng
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130012, China
| | - Martyn A McLachlan
- Department of Materials and Centre for Processable Electronics, Molecular Science Research Hub, Imperial College, London W12 0BZ, U.K
| | - Jiaqi Zhang
- College of Materials Science and Engineering, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130012, China
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Gao Y, Yan C, Peng X, Li W, Cao J, Wang Q, Zeng X, Fu X, Yang W. The metal doping strategy in all inorganic lead halide perovskites: synthesis, physicochemical properties, and optoelectronic applications. NANOSCALE 2021; 13:18010-18031. [PMID: 34718363 DOI: 10.1039/d1nr04706j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
All inorganic perovskites CsPbX3 (X = Cl, Br, I), rising stars of optical materials, have shown promising application prospects in optoelectronic and photovoltaic fields. However, some open issues still exist in these perovskites, like poor long-term stability, inevitable intrinsic defects and much nonradiative recombination, which greatly weakens their optical capability and seriously hinders their further development. The metal doping strategy, through the partial substitution of foreign ions for native ions, has gradually become an effective method for significantly enhancing the comprehensive properties of CsPbX3. Whereas some previous studies have reported the impressive properties of metal-doped CsPbX3, there is still a lack of a comprehensive review on the influences of metal doping on CsPbX3. In this review, we aim to provide a systematic review of the latest achievements in metal-doped CsPbX3, which focuses on their synthetic methods and the positive effects of metal doping on structure, optical properties, morphology control, carrier behavior and related optoelectronic and photovoltaic devices. Finally, we put forward a few opportunities and challenges about the further investigation of metal-doped perovskites, which may help researchers explore new research directions.
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Affiliation(s)
- Yue Gao
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, P. R. China.
| | - Cheng Yan
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, P. R. China.
| | - Xiaodong Peng
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, P. R. China.
| | - Wen Li
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, P. R. China.
| | - Jingjing Cao
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, P. R. China.
| | - Qungui Wang
- College of Physics, Sichuan University, Chengdu 610041, P. R. China
| | - Xiankan Zeng
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, P. R. China.
| | - Xuehai Fu
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, P. R. China.
| | - Weiqing Yang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, P. R. China.
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Gao Y, Luo C, Yan C, Li W, Liu C, Yang W. Copper-doping defect-lowered perovskite nanosheets for deep-blue light-emitting diodes. J Colloid Interface Sci 2021; 607:1796-1804. [PMID: 34600343 DOI: 10.1016/j.jcis.2021.09.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/10/2021] [Accepted: 09/11/2021] [Indexed: 11/26/2022]
Abstract
Mixed-halide blue perovskites CsPb(Br/Cl)3 are considered promising candidates for developing efficient deep-blue perovskite light-emitting diodes (PeLEDs), but their low photoluminescence quantum yield (PLQY), environmental instability, and poor device performance gravely inhibit their future development. Here, we employ a heteroatomic Cu2+ doping strategy combined with post-treatment Br- anion exchange to prepare high-performance deep-blue perovskites CsPb(Br/Cl)3. The Cu2+ doping strategy significantly decreases the intrinsic chlorine defects, ensuring that the inferior CsPbCl3 quantum dots are transformed into two-dimensional nanosheets with enhanced violet photoluminescence and increased exciton binding energy. Further, with the post-treatment Br- anion exchange, the as-prepared CsPb(Br/Cl)3 nanosheets with more radiation recombination and less ion migration present an enhanced PLQY of 94% and better humidity stability of 30 days. Based on the optimized CsPb(Br/Cl)3, we fabricated deep-blue PeLEDs with luminescence emission at 462 nm, a maximum luminance of 761 cd m-2, and a current density of 205 mA cm-2. This work puts forward a feasible synthesis strategy to prepare efficient and stable mixed-halide blue perovskite CsPb(Br/Cl)3 and related blue PeLEDs, which may promote the further application of mixed-halide perovskites in the blue light range.
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Affiliation(s)
- Yue Gao
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, PR China
| | - Chao Luo
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, PR China
| | - Cheng Yan
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, PR China
| | - Wen Li
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, PR China
| | - Chuanqi Liu
- College of Optoelectronic Engineering, Chengdu University of Information Technology, Chengdu 610225, PR China
| | - Weiqing Yang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, PR China.
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Precise Control of Green to Blue Emission of Halide Perovskite Nanocrystals Using Terbium Chloride as Chlorine Source. NANOMATERIALS 2021; 11:nano11092390. [PMID: 34578706 PMCID: PMC8470515 DOI: 10.3390/nano11092390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/29/2021] [Accepted: 09/01/2021] [Indexed: 11/28/2022]
Abstract
CsPbClxBr3-x nanocrystals were prepared by ligand-assisted deposition at room temperature, and their wavelength was accurately adjusted by doping TbCl3. The synthesized nanocrystals were monoclinic and the morphology was almost unchanged after doping. The fluorescence emission of CsPbClxBr3-x nanocrystals was easily controlled from green to blue by adjusting the amount of TbCl3, which realizes the continuous and accurate spectral regulation in the range of green to blue. This method provides a new scheme for fast anion exchange of all-inorganic perovskite nanocrystals in an open environment at room temperature.
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Zhu Y, Zhao J, Li X, Xu X, Huang J, Ji X, Yang G, Pan G. Stable and Efficient Upconversion Single Red Emission from CsPbI 3 Perovskite Quantum Dots Triggered by Upconversion Nanoparticles. Inorg Chem 2021; 60:2649-2655. [PMID: 33522231 DOI: 10.1021/acs.inorgchem.0c03516] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here, composites including highly efficient inert shell-modified NaYF4:Yb/Tm@NaYF4 upconversion nanoparticles (UCNPs) and CsPbI3 perovskite quantum dots (PQDs) have been successfully synthesized by the assistance of (3-aminopropyl)triethoxysilane (APTES) as a precursor for a SiO2 matrix. UCNPs and CsPbI3 PQDs in this composite structure show excellent stability in ambient conditions. Importantly, the efficient UC emission of CsPbI3 PQDs was realized, which means that the single red emission of inert shell-modified UCNPs can be easily obtained by depending on these composite structures. Furthermore, the single red emission wavelength can be easily regulated from 705 to 625 nm by introducing appropriate proportion of Br- ions, which is very difficult to achieve for traditional UCNPs. Moreover, benefiting from the efficient downshifting (DS) red emission of CsPbI3 PQDs, the composites possess the dual-wavelength excitation characteristics. So, the excellent dual-mode anticounterfeiting application has been demonstrated. This work will provide a new idea for the development of perovskite-based multifunctional materials.
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Affiliation(s)
- Yongsheng Zhu
- Henan International Joint Laboratory of MXene Materials Microstructure, College of Physics and Electronic Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, P. R. China
| | - Jun Zhao
- School of Physics and Electronics, Henan University, No.1 Jinming Street, Kaifeng 475004, P. R. China
| | - Xueguo Li
- Henan International Joint Laboratory of MXene Materials Microstructure, College of Physics and Electronic Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, P. R. China
| | - Xiumei Xu
- Henan International Joint Laboratory of MXene Materials Microstructure, College of Physics and Electronic Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, P. R. China
| | - Jinshu Huang
- Henan International Joint Laboratory of MXene Materials Microstructure, College of Physics and Electronic Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, P. R. China
| | - Xiaoxu Ji
- Henan International Joint Laboratory of MXene Materials Microstructure, College of Physics and Electronic Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, P. R. China
| | - Gang Yang
- Henan International Joint Laboratory of MXene Materials Microstructure, College of Physics and Electronic Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, P. R. China
| | - Gencai Pan
- School of Physics and Electronics, Henan University, No.1 Jinming Street, Kaifeng 475004, P. R. China
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43
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Chiba T, Sato J, Ishikawa S, Takahashi Y, Ebe H, Sumikoshi S, Ohisa S, Kido J. Neodymium Chloride-Doped Perovskite Nanocrystals for Efficient Blue Light-Emitting Devices. ACS APPLIED MATERIALS & INTERFACES 2020; 12:53891-53898. [PMID: 33210903 DOI: 10.1021/acsami.0c11736] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal halides doping of perovskite nanocrystals (NCs) has been shown to precisely control nonradiative pathways and to improve photoluminescence quantum yield (PLQY). Here, we report a trivalent lanthanide halide neodymium (III) chloride (NdCl3)-doped perovskite NCs prepared with a post-synthetic room temperature treatment for efficient blue light-emitting devices (LEDs). The Nd 3d and Cl 2p core peaks were observed in the NdCl3-doped NCs, which allowed for simultaneous doping of Nd3+ and Cl- into the pristine CsPbBr3 NCs. The NdCl3-doped NCs exhibited blue emission at a peak wavelength of 478 nm with a high PLQY of 97% in solution. We found that the Nd3+ cation incorporated into the NCs more effectively suppressed nonradiative recombination compared with common halide anion exchange from temperature dependence of optical properties. Blue LEDs based on NdCl3-doped NCs had an external quantum efficiency of 2.7%, which represents a considerable performance improvement compared with LEDs based on organic chloride salt-doped NCs.
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Affiliation(s)
- Takayuki Chiba
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yamagata, Yonezawa 992-8510, Japan
| | - Jun Sato
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yamagata, Yonezawa 992-8510, Japan
| | - Shota Ishikawa
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yamagata, Yonezawa 992-8510, Japan
| | - Yoshihito Takahashi
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yamagata, Yonezawa 992-8510, Japan
| | - Hinako Ebe
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yamagata, Yonezawa 992-8510, Japan
| | - Shunsuke Sumikoshi
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yamagata, Yonezawa 992-8510, Japan
| | - Satoru Ohisa
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yamagata, Yonezawa 992-8510, Japan
| | - Junji Kido
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yamagata, Yonezawa 992-8510, Japan
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Luo D, Wang L, Qiu Y, Huang R, Liu B. Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1226. [PMID: 32599722 PMCID: PMC7353084 DOI: 10.3390/nano10061226] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/17/2020] [Accepted: 06/17/2020] [Indexed: 11/16/2022]
Abstract
In recent years, impurity-doped nanocrystal light-emitting diodes (LEDs) have aroused both academic and industrial interest since they are highly promising to satisfy the increasing demand of display, lighting, and signaling technologies. Compared with undoped counterparts, impurity-doped nanocrystal LEDs have been demonstrated to possess many extraordinary characteristics including enhanced efficiency, increased luminance, reduced voltage, and prolonged stability. In this review, recent state-of-the-art concepts to achieve high-performance impurity-doped nanocrystal LEDs are summarized. Firstly, the fundamental concepts of impurity-doped nanocrystal LEDs are presented. Then, the strategies to enhance the performance of impurity-doped nanocrystal LEDs via both material design and device engineering are introduced. In particular, the emergence of three types of impurity-doped nanocrystal LEDs is comprehensively highlighted, namely impurity-doped colloidal quantum dot LEDs, impurity-doped perovskite LEDs, and impurity-doped colloidal quantum well LEDs. At last, the challenges and the opportunities to further improve the performance of impurity-doped nanocrystal LEDs are described.
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Affiliation(s)
- Dongxiang Luo
- Institute of Semiconductors, South China Normal University, Guangzhou 510631, China;
| | - Lin Wang
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore;
| | - Ying Qiu
- Guangdong R&D Center for Technological Economy, Guangzhou 510000, China
| | - Runda Huang
- School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China;
| | - Baiquan Liu
- State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
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Chen Y, Liu Y, Hong M. Cation-doping matters in caesium lead halide perovskite nanocrystals: from physicochemical fundamentals to optoelectronic applications. NANOSCALE 2020; 12:12228-12248. [PMID: 32507865 DOI: 10.1039/d0nr02922j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
All-inorganic caesium lead halide perovskite nanocrystals (PeNCs) with different dimensionalities have recently fascinated the research community due to their extraordinary optoelectronic properties including tunable bandgaps over the entire visible spectral region, high photoluminescence quantum yields (PLQYs) close to unity and narrow emission line widths down to 10-20 nm, making them particularly suitable as promising candidates for numerous applications ranging from light-emitting diodes (LEDs), solar cells to scintillators. Despite the considerable progress made in the past six years, the real-world applications of caesium lead halide PeNCs themselves especially in the category of CsPbX3 (X = Cl, Br and I) are still restricted by their labile crystal lattices and downgraded luminescence when exposed to ambient air conditions. Recent experimental and theoretical studies on cation doping have proven to be an effective way to significantly improve the physicochemical properties of cesium lead halide PeNCs, which would have profound implications for a range of applications. In this review, we provide a brief overview of the most recent advances in cation-doped all-inorganic caesium lead halide PeNCs, aimed at developing high-performance and long-term stable optoelectronic and photovoltaic devices, which covers areas from their fundamental considerations of cation doping, controlled synthesis methodology and novel physicochemical properties to the optoelectronic applications with an emphasis on perovskite-based LEDs and solar cells. And finally, some possible directions of future efforts toward this active research field are also proposed.
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Affiliation(s)
- Yameng Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. and University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Yongsheng Liu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. and University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Maochun Hong
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. and University of the Chinese Academy of Sciences, Beijing, 100049, China
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Shao H, Zhai Y, Wu X, Xu W, Xu L, Dong B, Bai X, Cui H, Song H. High brightness blue light-emitting diodes based on CsPb(Cl/Br) 3 perovskite QDs with phenethylammonium chloride passivation. NANOSCALE 2020; 12:11728-11734. [PMID: 32458868 DOI: 10.1039/d0nr02597f] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
All inorganic perovskite quantum dots (QDs) (CsPbX3, X = Cl, Br, I) have been applied on light-emitting devices (LEDs) in recent years due to their excellent optical and optoelectronic properties. However, blue-light emitting perovskite QD LEDs (PQD-LEDs) exhibit poor performances compared with their green- and red-light emitting counterparts. Herein, we fabricated high performing blue-light emitting PQD-LEDs based on phenethylammonium chloride (PEACl) modified CsPb(Cl/Br)3 QDs. Firstly, the PEA-CsPbCl3 QDs were synthesized by introducing certain amounts of PEACl in the conventional hot-injection synthesis process. The merit of our synthesis lies in the fact that not only the Cl vacancies of CsPbCl3 QDs are efficiently modified by introducing the PEACl precursor, but also the partial long-chain organic ligands (OLA) capping on the surface of CsPbCl3 QDs are simultaneously replaced by shorter PEACl chains. Consequently, the PEA-CsPbCl3 QDs emitting at 410 nm with a PLQY of 62.3% were achieved. Furthermore, to meet the requirement of display applications, we exchanged Cl- with Br- ions at room temperature to precisely control the blue emission in the 460-470 nm spectral region and with a maximum PLQY of 80.2% at 470 nm. Finally, the PQD-LEDs based on PEA-CsPb(Cl/Br)3 perovskite QDs emitting at 462, 465, 468 and 470 nm were fabricated. The PQD-LEDs exhibit a maximal EQE of 2.15% and luminance of 620 cd m-2, which provides the highest value of luminance for the PQD-LEDs in the blue spectral range that satisfies the requirement of practical display applications.
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Affiliation(s)
- He Shao
- College of Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, China. and State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Yue Zhai
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Xiufeng Wu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Wen Xu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Lin Xu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Biao Dong
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Xue Bai
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Haining Cui
- College of Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Hongwei Song
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
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Lu CH, Biesold-McGee GV, Liu Y, Kang Z, Lin Z. Doping and ion substitution in colloidal metal halide perovskite nanocrystals. Chem Soc Rev 2020; 49:4953-5007. [PMID: 32538382 DOI: 10.1039/c9cs00790c] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The past decade has witnessed tremendous advances in synthesis of metal halide perovskites and their use for a rich variety of optoelectronics applications. Metal halide perovskite has the general formula ABX3, where A is a monovalent cation (which can be either organic (e.g., CH3NH3+ (MA), CH(NH2)2+ (FA)) or inorganic (e.g., Cs+)), B is a divalent metal cation (usually Pb2+), and X is a halogen anion (Cl-, Br-, I-). Particularly, the photoluminescence (PL) properties of metal halide perovskites have garnered much attention due to the recent rapid development of perovskite nanocrystals. The introduction of capping ligands enables the synthesis of colloidal perovskite nanocrystals which offer new insight into dimension-dependent physical properties compared to their bulk counterparts. It is notable that doping and ion substitution represent effective strategies for tailoring the optoelectronic properties (e.g., absorption band gap, PL emission, and quantum yield (QY)) and stabilities of perovskite nanocrystals. The doping and ion substitution processes can be performed during or after the synthesis of colloidal nanocrystals by incorporating new A', B', or X' site ions into the A, B, or X sites of ABX3 perovskites. Interestingly, both isovalent and heterovalent doping and ion substitution can be conducted on colloidal perovskite nanocrystals. In this review, the general background of perovskite nanocrystals synthesis is first introduced. The effects of A-site, B-site, and X-site ionic doping and substitution on the optoelectronic properties and stabilities of colloidal metal halide perovskite nanocrystals are then detailed. Finally, possible applications and future research directions of doped and ion-substituted colloidal perovskite nanocrystals are also discussed.
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Affiliation(s)
- Cheng-Hsin Lu
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Gill V Biesold-McGee
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Yijiang Liu
- College of Chemistry, Xiangtan University, Xiangtan, Hunan Province 411105, P. R. China.
| | - Zhitao Kang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA. and Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
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