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Paul T, Maity A, Bairi P, Sahoo A, Maiti S, Singh M, Ghosh B, Banerjee R. Vortex flow induced self-assembly in CsPbI 3 rods leads to an improved electrical response towards external analytes. Dalton Trans 2024; 53:6333-6342. [PMID: 38488088 DOI: 10.1039/d4dt00013g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
We present a facile and versatile strategy for enabling CsPbI3 rods to self-assemble at an air-water interface. The CsPbI3 rods, which float at the air-water interface, align under the influence of the rotational flow field due to the vortex motion of a water subphase. The aligned CsPbI3 rods could be transferred onto various substrates without involving any sophisticated instrumentation. The temperature of the subphase, the concentration of the CsPbI3 aliquot, the rotational speed inducing vortex motion, and the lift-off position and angle of the substrate were optimized to achieve high coverage of the self-assembled rods of CsPbI3 on glass. The Rietveld refinement of the XRD profile confirms that the aligned CsPbI3 is in the pure orthorhombic phase ascribed to the Pnma space group. The hydrophilic carboxylic group of the oleic acid attaches to the Pb atoms of the halide perovskite rods, while their hydrophobic tails encapsulate the rods within their shell, creating a shielding barrier between the water and the perovskite surface like a reverse micelle. The aligned CsPbI3 rods exhibit a nearly 47-fold increment in current upon exposure to ammonia gas (amounting to 5.6 times higher sensitivity in ammonia sensing) compared to the non-aligned CsPbI3 rods.
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Affiliation(s)
- Tufan Paul
- Department of Physics, Indian Institute of Technology Gandhinagar, Palaj 382355, India.
| | - Avisek Maity
- S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
| | - Partha Bairi
- Centre of Excellence for Composites, Ahmedabad Textile Industry's Research Association (ATIRA), Ahmedabad 380015, India
| | - Aditi Sahoo
- Department of Physics, Indian Institute of Technology Gandhinagar, Palaj 382355, India.
| | - Soumen Maiti
- St. Thomas College of Engineering & Technology Kolkata, 700023, India
| | - Manoj Singh
- Department of Physics, Indian Institute of Technology Gandhinagar, Palaj 382355, India.
| | - Barnali Ghosh
- S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
| | - Rupak Banerjee
- Department of Physics, Indian Institute of Technology Gandhinagar, Palaj 382355, India.
- K C Patel Centre for Sustainable Development, Indian Institute of Technology Gandhinagar, Palaj 382355, India
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2
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Qin Q, Liu Y, Gao G, Chen Z, Gao Z, Chen L, Zhong X, Zou B. Tunable dual-emission of Sb 3+, Ho 3+Co-doped Cs 2NaScCl 6single crystals for light-emitting diodes. NANOTECHNOLOGY 2023; 35:115203. [PMID: 38086072 DOI: 10.1088/1361-6528/ad14b2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 12/11/2023] [Indexed: 12/30/2023]
Abstract
Lead-free halide double perovskites are considered as one of the most promising materials in optoelectronic devices, such as solar cells, photodetectors, and light-emitting diodes (LEDs), due to their environmental friendliness and chemical stability. However, the extremely low photoluminescence quantum yield (PLQY) of self-trapped excitons (STEs) emission from lead-free halide double perovskites impedes their applications. Herein, Sb3+ions were doped into rare-earth-based double perovskite Cs2NaScCl6single crystals (SCs), resulting in a large enhancement of PLQY from 12.57% to 87.37%. Moreover, by co-doping Sb3+and Ho3+into Cs2NaScCl6SCs, the emission color can be tuned from blue to red, due to an efficient energy transfer from STEs to Ho3+ions. Finally, the synthesized sample was used in multicolor LED, which exhibited excellent stability and optical properties. This work not only provides a new strategy for improving the optical properties of Cs2NaScCl6SCs, but also suggests its potential application in multicolor LEDs.
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Affiliation(s)
- Qingyong Qin
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Yu Liu
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Ge Gao
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Zhaoqiong Chen
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Zejiang Gao
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Li Chen
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
| | - Xianci Zhong
- School of Civil Engineering and Architecture, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, People's Republic of China
| | - Bingsuo Zou
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People's Republic of China
- School of Resources, Environments and Materials, Guangxi University, Nanning 530004, People's Republic of China
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3
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Hong AR, Shin S, Kang G, Ko H, Jang HS. Intense Near-Infrared Light-Emitting NaYF 4:Nd,Yb-Based Nanophosphors for Luminescent Solar Concentrators. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3187. [PMID: 37110026 PMCID: PMC10145680 DOI: 10.3390/ma16083187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/08/2023] [Accepted: 04/12/2023] [Indexed: 06/19/2023]
Abstract
In this study, we synthesized NaYF4-based downshifting nanophosphors (DSNPs), and fabricated DSNP-polydimethylsiloxane (PDMS) composites. Nd3+ ions were doped into the core and shell to increase absorbance at 800 nm. Yb3+ ions were co-doped into the core to achieve intense near-infrared (NIR) luminescence. To further enhance the NIR luminescence, NaYF4:Nd,Yb/NaYF4:Nd/NaYF4 core/shell/shell (C/S/S) DSNPs were synthesized. The C/S/S DSNPs showed a 3.0-fold enhanced NIR emission at 978 nm compared with core DSNPs under 800 nm NIR light. The synthesized C/S/S DSNPs showed high thermal stability and photostability against the irradiation with ultraviolet light and NIR light. Moreover, for application as luminescent solar concentrators (LSCs), C/S/S DSNPs were incorporated into the PDMS polymer, and the DSNP-PDMS composite containing 0.25 wt% of C/S/S DSNP was fabricated. The DSNP-PDMS composite showed high transparency (average transmittance = 79.4% for the visible spectral range of 380-750 nm). This result demonstrates the applicability of the DSNP-PDMS composite in transparent photovoltaic modules.
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Affiliation(s)
- A-Ra Hong
- Materials Architecturing Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea; (A.-R.H.); (S.S.)
| | - Seungyong Shin
- Materials Architecturing Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea; (A.-R.H.); (S.S.)
| | - Gumin Kang
- Nanophotonics Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea; (G.K.); (H.K.)
| | - Hyungduk Ko
- Nanophotonics Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea; (G.K.); (H.K.)
| | - Ho Seong Jang
- Materials Architecturing Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea; (A.-R.H.); (S.S.)
- Division of Nano & Information Technology, KIST School, Korea University of Science and Technology (UST), Seoul 02792, Republic of Korea
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Pramanik A, Sinha SS, Gates K, Nie J, Han FX, Ray PC. Light-Induced Wavelength Dependent Self Assembly Process for Targeted Synthesis of Phase Stable 1D Nanobelts and 2D Nanoplatelets of CsPbI 3 Perovskites. ACS OMEGA 2023; 8:13202-13212. [PMID: 37065067 PMCID: PMC10099116 DOI: 10.1021/acsomega.3c00477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 03/15/2023] [Indexed: 06/19/2023]
Abstract
Despite black cubic phase α-CsPbI3 nanocrystals having an ideal bandgap of 1.73 eV for optoelectronic applications, the phase transition from α-CsPbI3 to non-perovskite yellow δ-CsPbI3 phase at room temperature remains a major obstacle for commercial applications. Since γ-CsPbI3 is thermodynamically stable with a bandgap of 1.75 eV, which has great potential for photovoltaic applications, herein we report a conceptually new method for the targeted design of phase stable and near unity photoluminescence quantum yield (PLQY) two-dimensional (2D) γ-CsPbI3 nanoplatelets (NPLs) and one-dimensional (1D) γ-CsPbI3 nanobelts (NBs) by wavelength dependent light-induced assembly of CsPbI3 cubic nanocrystals. This article demonstrates for the first time that by varying the excitation wavelengths, one can design air stable desired 2D nanoplatelets or 1D nanobelts selectively. Our experimental finding indicates that 532 nm green light-driven self-assembly produces phase stable and highly luminescent γ-CsPbI3 NBs from CsPbI3 nanocrystals. Moreover, we show that a 670 nm red light-driven self-assembly process produces stable and near unity PLQY γ-CsPbI3 NPLs. Systematic time-dependent microscopy and spectroscopy studies on the morphological evolution indicates that the electromagnetic field of light triggered the desorption of surface ligands from the nanocrystal surface and transformation of crystallographic phase from α to γ. Detached ligands played an important role in determining the morphologies of final structures of NBs and NPLs from nanocrystals via oriented attachment along the [110] direction initially and then the [001] direction. In addition, XRD and fluorescence imaging data indicates that both NBs and NPLs exhibit phase stability for more than 60 days in ambient conditions, whereas the cubic phase α-CsPbI3 nanocrystals are not stable for even 3 days. The reported light driven synthesis provides a simple and versatile approach to obtain phase pure CsPbI3 for possible optoelectronic applications.
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5
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Wu N, Zhai Y, Chang P, Mei H, Wang Z, Zhang H, Zhu Q, Liang P, Wang L. Rubidium ions doping to improve the photoluminescence properties of Mn doped CsPbCl 3perovskite quantum dots. NANOTECHNOLOGY 2023; 34:145701. [PMID: 36260977 DOI: 10.1088/1361-6528/ac9b62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
All-inorganic cesium lead halide CsPbX3(X = Cl, Br, I) perovskite quantum dots (PQDs) have shown promising potential in current Mini/Micro-LED display applications due to their excellent photoluminescence performance. However, lead ions in PQDs are easily to leak owing to the unstable structure of PQDs, which hinders their commercial applications. Herein, we adopt Rb+ions co-doping strategy to regulate the doping characteristics of Mn2+ions in CsPbCl3PQDs. The synthesized CsPbCl3:(Rb+, Mn2+) PQDs possess enhanced photoluminescence quantum yield of 71.1% due to the reduction of intrinsic defect states and Mn-Mn or Mn-traps in co-doped PQDs. Moreover, the white light emission of CsPb(Cl/Br)3:(Rb+, Mn2+) PQDs is achieved by anion exchange reaction and the constructed WLED exhibits the CIE coordinate of (0.33, 0.29) and the correlated color temperature of 5497 K. Benefiting from the substitution strategy, these doped CsPbX3PQDs can be widely used as fluorescence conversion materials for the construction of Mini/Micro-LED.
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Affiliation(s)
- Na Wu
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Yue Zhai
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Peng Chang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Hang Mei
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Ziyan Wang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Hong Zhang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Qiangqiang Zhu
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Pei Liang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Le Wang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China
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6
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Wang W, Li Y, Duan Y, Qiu M, An H, Peng Z. Performance Enhancement of Perovskite Quantum Dot Light-Emitting Diodes via Management of Hole Injection. MICROMACHINES 2022; 14:mi14010011. [PMID: 36677071 PMCID: PMC9863841 DOI: 10.3390/mi14010011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/14/2022] [Accepted: 12/19/2022] [Indexed: 06/01/2023]
Abstract
Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is widely used in optoelectronic devices due to its excellent hole current conductivity and suitable work function. However, imbalanced carrier injection in the PEDOT:PSS layer impedes obtaining high-performance perovskite light-emitting diodes (PeLEDs). In this work, a novel poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,40-(N-(p-butylphenyl))diphenylamine)] (TFB) is applied as the hole transport layers (HTLs) to facilitate the hole injection with cascade-like energy alignment between PEDOT:PSS and methylammonium lead tribromide (MAPbBr3) film. Our results indicate that the introduced TFB layer did not affect the surface morphology or lead to any additional surface defects of the perovskite film. Consequently, the optimal PeLEDs with TFB HTLs show a maximum current efficiency and external quantum efficiency (EQE) of 21.26 cd A-1 and 6.68%, respectively. Such EQE is 2.5 times higher than that of the control devices without TFB layers. This work provides a facile and robust route to optimize the device structure and improve the performance of PeLEDs.
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Affiliation(s)
- Weigao Wang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yiyang Li
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yu Duan
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Mingxia Qiu
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Hua An
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Zhengchun Peng
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
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7
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Lyu B, Hu J, Chen Y, Ma Z. Spectra Stable Quantum Dots Enabled by Band Engineering for Boosting Electroluminescence in Devices. MICROMACHINES 2022; 13:1315. [PMID: 36014239 PMCID: PMC9416132 DOI: 10.3390/mi13081315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/12/2022] [Accepted: 08/12/2022] [Indexed: 06/15/2023]
Abstract
The band level landscape in quantum dots is of great significance toward achieving stable and efficient electroluminescent devices. A series of quantum dots with specific emission and band structure of the intermediate layer is designed, including rich CdS (R-CdS), thick ZnSe (T-ZnSe), thin ZnSe (t-ZnSe) and ZnCdS (R-ZnCdS) intermediate alloy shell layers. These quantum dots in QLEDs show superior performance, including maximum current efficiency, external quantum efficiencies and a T50 lifetime (at 1000 cd/m2) of 47.2 cd/A, 11.2% and 504 h for R-CdS; 61.6 cd/A, 14.7% and 612 h for t-ZnSe; 70.5 cd/A, 16.8% and 924 h for T-ZnSe; and 82.0 cd/A, 19.6% and 1104 h for R-ZnCdS. Among them, the quantum dots with the ZnCdS interlayer exhibit deep electron confinement and shallow hole confinement capabilities, which facilitate the efficient injection and radiative recombination of carriers into the emitting layer. Furthermore, the optimal devices show a superior T50 lifetime of more than 1000 h. The proposed novel methodology of quantum dot band engineering is expected to start a new way for further enhancing QLED exploration.
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Affiliation(s)
- Bingbing Lyu
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Junxia Hu
- School of Information Engineering, Xinyang Agriculture and Forestry University, Xinyang 464000, China
| | - Yani Chen
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Zhiwei Ma
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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8
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Dixit P, Pandey PK, Chauhan V, Deshmukh PP, Satapathy S, Pandey PC. Improvement in white light emission of Dy3+ doped CaMoO4 via Zn2+ co-doping. Methods Appl Fluoresc 2022; 10. [PMID: 35901802 DOI: 10.1088/2050-6120/ac8528] [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: 03/31/2022] [Accepted: 07/28/2022] [Indexed: 11/12/2022]
Abstract
The research in developing a single ingredient phosphor for white-light emission is progressively increasing. It is well known that the 4F9/2→ 6H13/2 (yellow) and 4F9/2→ 6H15/2 (blue) transitions of Dy3+ ions give near-white light emission. The white light emission of the Dy3+ ions can be enhanced by improving the crystallinity of the host phosphor via co-doping of transition metal ions. In this paper, we report a significant improvement in the white light emission of Dy3+ doped CaMoO4 by co-doping Zn2+ ions. The X ray diffraction pattern confirms the tetragonal phase of pure and doped CaMoO- 4 phosphor. The peak broadening and a red-shift in the absorption peak are observed by UV-Vis absorption analysis of Zn2+/Dy3+ doped CaMoO4. From Photoluminescence studies, we have observed that in Dy3+ doped CaMoO4, the 4% Dy3+ doped CaMoO4exhibits maximum emission. The Zn2+ ions are co-doped to further increase the luminescence intensity of CaMoO4:4%Dy3+ and the maximum luminescence is obtained for 0.25% Zn2+ concentration. Two prominent emission peaks centered at 484 nm and 574 nm related to transitionsT⃗he 4F9/2→ 6H13/2 4F9/2 6H15/2 and 4F9/2→ 6H13/2 of Dy3+ ion are observed for Dy3+ doped phosphor.transition is the forced electric dipole transition which is affected by its chemicalenvironment. After Zn2+ co-doping, the 4F9/2→ 6H13/2 transition is affected due to a change in asymmetricity around the Dy3+ ions. The 0.25% co-doping of Zn2+ gives 34% enhancement in luminescence emission of 4% Dy3+ doped CaMoO4. As a result, the CIE coordinates and color purity of the 0.25% Zn2+ co-doped CaMoO4:4Dy3+ show improvement in the overall white light emission. We have shown that with Zn2+ co-doping, the non-radiative relaxations are reduced which results in improved white light emission of Dy3+ions.
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Affiliation(s)
- Prashant Dixit
- Physics, Indian Institute of Technology Banaras Hindu University, Varanasi, Varanasi, 221005, INDIA
| | - Prashant Kumar Pandey
- Department of Physics, Indian Institute of Technology Banaras Hindu University, Varanasi, Varanasi, Uttar Pradesh, 221005, INDIA
| | - Vaibhav Chauhan
- Department of Physics, Indian Institute of Technology Banaras Hindu University, Varanasi, Varanasi, Uttar Pradesh, 221005, INDIA
| | - Pratik Pratap Deshmukh
- LFMD, Raja Ramanna Centre for Advanced Technology, RRCAT, CAT Post, 452013, Indore, Indore, Madhya Pradesh, 452013, INDIA
| | - Srinibas Satapathy
- Laser and Functional Materials Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013, Indore, 452013, INDIA
| | - Praveen Chandra Pandey
- Department of Physics, Indian Institute of Technology Banaras Hindu University, Varanasi, Varanasi, Uttar Pradesh, 221005, INDIA
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Ji Y, Wang M, Yang Z, Wang H, Padhiar MA, Qiu H, Dang J, Miao Y, Zhou Y, Bhatti AS. Strong violet emission from ultra-stable strontium-doped CsPbCl 3 superlattices. NANOSCALE 2022; 14:2359-2366. [PMID: 35088791 DOI: 10.1039/d1nr07848h] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Among the lead halide perovskites, the photoluminescence quantum yields (PLQYs) of perovskite quantum dots (PQDs) in the violet region are the very lowest. This is an obstacle to the optical applications across the entire visible area based on perovskite materials. Herein, we report a novel strontium (Sr)-substitution along with chlorine passivation strategy to enhance the PLQYs of CsPbCl3 PQDs. We surprisingly found that when the molar ratio of Sr2+/Pb2+ = 0.1/0.9, CsSr0.1Pb0.9Cl3 PQDs exhibit strong single-color violet emission, which is attributed to the effective passivation of chlorine defects. We further found spontaneous self-assembly of PQDs into highly emissive PSCs from the precursor in a highly concentrated solution. Moreover, by dilution of these PSCs, a few small PQD aggregates can be regained, which is similar to the PQDs formed at lower concentrations. Benefiting from the superior collective properties of individual PQDs, these highly fluorescent CsSr0.1Pb0.9Cl3 PSCs can maintain good stability even when directly immersed in water or exposed to illumination.
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Affiliation(s)
- Yongqiang Ji
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
- State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China
| | - Minqiang Wang
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Zhi Yang
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Hao Wang
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Muhammad Amin Padhiar
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Hengwei Qiu
- Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China
| | - Jialin Dang
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Yinru Miao
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Yun Zhou
- Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research (ICDR), Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic and Information Engineering, Xi'an Jiaotong University, 710049 Xi'an, China.
| | - Arshad Saleem Bhatti
- Centre for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad, 44500, Pakistan
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10
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Liu J, Zheng X, Mohammed OF, Bakr OM. Self-Assembly and Regrowth of Metal Halide Perovskite Nanocrystals for Optoelectronic Applications. Acc Chem Res 2022; 55:262-274. [PMID: 35037453 PMCID: PMC8811956 DOI: 10.1021/acs.accounts.1c00651] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
![]()
Over the past decade, the impressive development
of metal halide
perovskites (MHPs) has made them leading candidates for applications
in photovoltaics (PVs), X-ray scintillators, and light-emitting diodes
(LEDs). Constructing MHP nanocrystals (NCs) with promising optoelectronic
properties using a low-cost approach is critical to realizing their
commercial potential. Self-assembly and regrowth techniques provide
a simple and powerful “bottom-up” platform for controlling
the structure, shape, and dimensionality of MHP NCs. The soft ionic
nature of MHP NCs, in conjunction with their low formation energy,
rapid anion exchange, and ease of ion migration, enables the rearrangement
of their overall appearance via self-assembly or regrowth. Because
of their low formation energy and highly dynamic surface ligands,
MHP NCs have a higher propensity to regrow than conventional hard-lattice
NCs. Moreover, their self-assembly and regrowth can be achieved simultaneously.
The self-assembly of NCs into close-packed, long-range-ordered mesostructures
provides a platform for modulating their electronic properties (e.g.,
conductivity and carrier mobility). Moreover, assembled MHP NCs exhibit
collective properties (e.g., superfluorescence, renormalized emission,
longer phase coherence times, and long exciton diffusion lengths)
that can translate into dramatic improvements in device performance.
Further regrowth into fused MHP nanostructures with the removal of
ligand barriers between NCs could facilitate charge carrier transport,
eliminate surface point defects, and enhance stability against moisture,
light, and electron-beam irradiation. However, the synthesis strategies,
diversity and complexity of structures, and optoelectronic applications
that emanate from the self-assembly and regrowth of MHPs have not
yet received much attention. Consequently, a comprehensive understanding
of the design principles of self-assembled and fused MHP nanostructures
will fuel further advances in their optoelectronic applications. In this Account, we review the latest developments in the self-assembly
and regrowth of MHP NCs. We begin with a survey of the mechanisms,
driving forces, and techniques for controlling MHP NC self-assembly.
We then explore the phase transition of fused MHP nanostructures at
the atomic level, delving into the mechanisms of facet-directed connections
and the kinetics of their shape-modulation behavior, which have been
elucidated with the aid of high-resolution transmission electron microscopy
(HRTEM) and first-principles density functional theory calculations
of surface energies. We further outline the applications of assembled
and fused nanostructures. Finally, we conclude with a perspective
on current challenges and future directions in the field of MHP NCs.
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Affiliation(s)
- Jiakai Liu
- Division of Physical Sciences and Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Xiaopeng Zheng
- Division of Physical Sciences and Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Omar F. Mohammed
- Division of Physical Sciences and Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Osman M. Bakr
- Division of Physical Sciences and Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
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11
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Ling L, Dong H, Hu Y, Zeng T, Chen Y, Mensah-Darkwa K, Emmanuel TA, Ali G, Xie Y. Stabilizing Red-emissive All-inorganic Perovskite Nanocrystal by Ligands-mediated Room-temperature Procedure. CrystEngComm 2022. [DOI: 10.1039/d2ce00910b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although lead halide perovskites (LHPs) nanocrystals (NCs) are considered propitious materials due to their extraordinary optoelectronic properties, the scalability of synthesis and poor ambient stability hinder their commercial applications. Herein,...
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12
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Liu J, Song K, Zheng X, Yin J, Yao KX, Chen C, Yang H, Hedhili MN, Zhang W, Han P, Mohammed OF, Han Y, Bakr OM. Cyanamide Passivation Enables Robust Elemental Imaging of Metal Halide Perovskites at Atomic Resolution. J Phys Chem Lett 2021; 12:10402-10409. [PMID: 34672588 DOI: 10.1021/acs.jpclett.1c02830] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lead halide perovskites (LHPs) have attracted a tremendous amount of attention because of their applications in solar cells, lighting, and optoelectronics. However, the atomistic principles underlying their decomposition processes remain in large part obscure, likely due to the lack of precise information about their local structures and composition along regions with dimensions on the angstrom scale, such as crystal interfaces. Aberration-corrected scanning transmission electron microscopy combined with X-ray energy dispersive spectroscopy (EDS) is an ideal tool, in principle, for probing such information. However, atomic-resolution EDS has not been achieved for LHPs because of their instability under electron-beam irradiation. We report the fabrication of CsPbBr3 nanoplates with high beam stability through an interface-assisted regrowth strategy using cyanamide. The ultrahigh stability of the nanoplates primarily stems from two contributions: defect-healing self-assembly/regrowth processes and surface modulation by strong electron-withdrawing cyanamide molecules. The ultrahigh stability of as-prepared CsPbBr3 nanoplates enabled atomic-resolution EDS elemental mapping, which revealed atomically and elementally resolved details of the LHP nanostructures at an unprecedented level. While improving the stability of LHPs is critical for device applications, this work illustrates how improving the beam stability of LHPs is essential for addressing fundamental questions on structure-property relations in LHPs.
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Affiliation(s)
- Jiakai Liu
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Kepeng Song
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
- Suzhou Research Institute, Shandong University, Suzhou 215123, China
| | - Xiaopeng Zheng
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jun Yin
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Ke Xin Yao
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Cailing Chen
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Haoze Yang
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Mohamed Nejib Hedhili
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Wang Zhang
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Peigang Han
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Omar F Mohammed
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Yu Han
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Osman M Bakr
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
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13
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Kim HR, Bong JH, Park JH, Song Z, Kang MJ, Son DH, Pyun JC. Cesium Lead Bromide (CsPbBr 3) Perovskite Quantum Dot-Based Photosensor for Chemiluminescence Immunoassays. ACS APPLIED MATERIALS & INTERFACES 2021; 13:29392-29405. [PMID: 34137577 DOI: 10.1021/acsami.1c08128] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Chemiluminescence immunoassays have been widely employed for diagnosing various diseases. However, because of the extremely low intensity chemiluminescence signals, highly sensitive transducers, such as photomultiplier tubes and image sensors with cooling devices, are required to overcome this drawback. In this study, a hypersensitive photosensor was developed based on cesium lead bromide (CsPbBr3) perovskite quantum dots (QDs) with sufficient high sensitivity for chemiluminescence immunoassays. First, CsPbBr3 QDs with a highly uniform size, that is, 5 nm, were synthesized under thermodynamic control to achieve a high size confinement effect. For the fabrication of the photosensor, MoS2 nanoflakes were used as an electron transfer layer and heat-treated at an optimum temperature. Additionally, a parylene-C film was used as a passivation layer to improve the physical stability and sensitivity of the photosensor. In particular, the trap states on the CsPbBr3 QDs were reduced by the passivation layer, and the sensitivity was increased. Finally, a photosensor based on CsPbBr3 QDs was employed in chemiluminescence immunoassays for the detection of human hepatitis B surface antigen, human immunodeficiency virus antibody, and alpha-fetoprotein (AFP, a cancer biomarker). When compared with the conventionally used equipment, the photosensor was determined to be feasible for application in chemiluminescence immunoassays.
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Affiliation(s)
- Hong-Rae Kim
- Department of Materials Sciences and Engineering, Yonsei University, 50 Yonsei-Ro, Seo-dae-mun-gu, Seoul 120-749, Korea
| | - Ji-Hong Bong
- Department of Materials Sciences and Engineering, Yonsei University, 50 Yonsei-Ro, Seo-dae-mun-gu, Seoul 120-749, Korea
| | - Jun-Hee Park
- Department of Materials Sciences and Engineering, Yonsei University, 50 Yonsei-Ro, Seo-dae-mun-gu, Seoul 120-749, Korea
| | - Zhiquan Song
- Department of Materials Sciences and Engineering, Yonsei University, 50 Yonsei-Ro, Seo-dae-mun-gu, Seoul 120-749, Korea
| | - Min-Jung Kang
- Korea Institute of Science and Technology (KIST), Hwarangro 14-gil 5, Seongbuk-gu, Seoul 136-791, Korea
| | - Dong Hee Son
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Jae-Chul Pyun
- Department of Materials Sciences and Engineering, Yonsei University, 50 Yonsei-Ro, Seo-dae-mun-gu, Seoul 120-749, Korea
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14
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Ji Y, Wang M, Yang Z, Qiu H, Padhiar MA, Zhou Y, Wang H, Dang J, Gaponenko NV, Bhatti AS. Trioctylphosphine-Assisted Pre-protection Low-Temperature Solvothermal Synthesis of Highly Stable CsPbBr 3/TiO 2 Nanocomposites. J Phys Chem Lett 2021; 12:3786-3794. [PMID: 33847498 DOI: 10.1021/acs.jpclett.1c00693] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lead halide perovskite quantum dots (PQDs) are reported as a promising branch of perovskites, which have recently emerged as a field in luminescent materials research. However, before the practical applications of PQDs can be realized, the problem of poor stability has not yet been solved. Herein, we propose a trioctylphosphine (TOP)-assisted pre-protection low-temperature solvothermal synthesis of highly stable CsPbBr3/TiO2 nanocomposites. Due to the protection of branched ligands and the lower temperature of shell formation, these TOP-modified CsPbBr3 PQDs are successfully incorporated into a TiO2 monolith without a loss of fluorescence intensity. Because the excellent nature of both parent materials is preserved in CsPbBr3/TiO2 nanocomposites, it is found that the as-prepared CsPbBr3/TiO2 nanocomposites not only display excellent photocatalytic activity but also yield improved PL stability, enabling us to build highly stable white light-emitting diodes and to photodegrade rhodamine B.
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Affiliation(s)
- Yongqiang Ji
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Minqiang Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zhi Yang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hengwei Qiu
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
- Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China
| | - Muhammad Amin Padhiar
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yun Zhou
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hui Wang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jialin Dang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education International Center for Dielectric Research and Shannxi Engineering Research Center of Advanced Energy Materials and Devices, Xi'an Jiaotong University, Xi'an 710049, China
| | - Nikolai V Gaponenko
- Belarusian State University of Informatics and Radioelectronics, P. Browki St.6, 220013 Minsk, Belarus
| | - Arshad Saleem Bhatti
- Centre for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad 44500, Pakistan
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15
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Ji Y, Wang M, Yang Z, Qiu H, Wang H, Padhiar MA, Zhou Y, Dang J, Gaponenko NV, Bhatti AS. A versatile approach for shape-controlled synthesis of ultrathin perovskite nanostructures. Dalton Trans 2021; 50:3308-3314. [DOI: 10.1039/d0dt04203j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate that ultrathin CsPbBr3 nanostructures can be obtained by a simple mixing of precursor–ligand complexes under ambient conditions.
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