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Xin C, Zhang W, Li Z, Chen Z, Duan Z. Temperature-controlled tunable emission of Bi 3+-doped Rb 2SnCl 6 all-inorganic vacancy ordered lead-free perovskite for advanced anticounterfeiting. Dalton Trans 2024; 53:4243-4250. [PMID: 38334482 DOI: 10.1039/d3dt04137a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
At present, tuning the luminescence characteristics of phosphors by external physical stimuli such as temperature and pressure has attracted the interest of researchers. However, the emission-tunable luminescence processes by temperature or pressure in lead-free perovskite with ordered vacancy materials have not been systematically studied. In this study, Bi3+-doped Rb2SnCl6 crystals were successfully synthesized using a simple precipitation method, and these crystals demonstrated a remarkable enhancement of luminescence intensity compared with the unannealed ones at 140-200 °C, and with a red-shift in the emission peak from 450 to 500 nm. It was found that the annealing treatment increased the Bi-Cl bond length leading to emission red-shift and achieved the change in the emission intensity due to the band gap modulation of the material. Furthermore, a candidate material for the color-changing optical security strategies was obtained by combining the Bi3+-doped Rb2SnCl6 phosphor and printing ink. This work is a valuable reference for the rational design of luminescent perovskites with promising new functionalities and stimulates the great potential of luminescent perovskites in developing promising phosphors for advanced anticounterfeiting.
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Affiliation(s)
- Chengyue Xin
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China.
| | - Wenjun Zhang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China.
| | - Zhongfa Li
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China.
| | - Zihan Chen
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China.
| | - Zhongyu Duan
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China.
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Hao R, Duan CK. Unraveling the Photoluminescent Properties of Sb-Doped Cd-Based Inorganic Halides: A First-Principles Study. Inorg Chem 2024; 63:3152-3164. [PMID: 38305730 DOI: 10.1021/acs.inorgchem.3c04300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Sb-doped Cd-based inorganic halides, with varying connections of CdCl6 octahedra ranging from 0D to 3D, exhibit a variety of photoluminescent properties. Single-band emission is observed in Sb-doped Rb4CdCl6 (0D) and Cs2CdCl4 (2D), while dual-band emission is seen in Sb-doped RbCdCl3 (1D) and CsCdCl3 (3D). Density-functional-based first-principles calculations were conducted. The results reveal that cation vacancies, acting as charge compensators, influence the luminescence properties of dopant centers. In CsCdCl3, the local cation vacancy VCd″ for Sb3+ at the Cd2+ site ([Sb□Cl9]6-) significantly modifies the photoluminescence property, accounting for the observed dual-band emission alongside the nonlocal compensation case. This effect is insignificant in Sb-doped Rb4CdCl6, RbCdCl3, and Cs2CdCl4, due to the large distances or high formation energies of Cd vacancies in these hosts. However, in Sb-doped RbCdCl3, two different potential energy minima, one that involves typical structure relaxation and the other that is off-center, lead to the observed dual-band emission. Furthermore, the shift of the charge transition level illustrates the different temperature dependences of the dual-band emission caused by the charge-compensating point defects. These insights not only enhance our understanding of luminescent materials based on halides containing ns2 dopants but also provide valuable guidance for the design and optimization of luminescent materials.
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Affiliation(s)
- Ruijie Hao
- CAS Key Laboratory of Microscale Magnetic Resonance, and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
- CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Chang-Kui Duan
- CAS Key Laboratory of Microscale Magnetic Resonance, and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
- CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
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3
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Wu R, Liu Y, Tang J, Xiao Z. Excited-State Dopant-Host Energy-Level Alignment: Toward a Better Understanding of the Photoluminescence Behaviors of Doped Phosphors. J Phys Chem Lett 2023; 14:4071-4077. [PMID: 37096973 DOI: 10.1021/acs.jpclett.3c00722] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Luminescent materials, also known as phosphors, have been widely used for applications such as emissive displays, fluorescent lamps, light-emitting diodes, and X-ray scintillation detectors. The energy-level diagram of a phosphor is extremely important for understanding its photoluminescence behavior. Here, we demonstrate through a combined density functional theory and experimental study that excited-state energy-level alignment accounts for the photoluminescence behaviors much better than ground-state energy-level alignment. An efficient doped phosphor should exhibit a type I excited-state dopant-host energy-level alignment, regardless of whether its ground-state alignment is type I. A type II excited-state dopant-host energy-level alignment implies that exciton dissociation, resulting in photoluminescence quenching. Our results provide not only a better understanding of the photoluminescence behaviors of the reported phosphors but also critical guidance for designing prospective luminescent materials.
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Affiliation(s)
- Ranyun Wu
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yingmeng Liu
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jiang Tang
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
- Optics Valley Laboratory, Wuhan 430074, China
| | - Zewen Xiao
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
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Liu R, Zhang W, Wen T, Wen X, Ding C, Li Z, Yan W. Excitation-Dependent Tunable White Light of ns 2 Ions Doped Rb 2SnCl 6 Vacancy Ordered Double Perovskite. J Phys Chem Lett 2022; 13:11143-11152. [PMID: 36441971 DOI: 10.1021/acs.jpclett.2c03057] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Single-matrix white light-emitting diodes are still a challenge. Achieving tunable white light emission from lead-free perovskites attracts much attention. Herein, nanoscale Rb2SnCl6 (RSC) vacancy ordered double perovskite were synthesized by an optimized precipitation method. Further, using ns2 ions (Bi3+, Te4+, and Sb3+) doped RSC vacancy ordered double perovskite to obtain broadband blue, yellow-green, and orange-red emission. The color temperature adjustable high-quality white light emission based on the codoping strategy is obtained by controlling the doping ratio of Bi3+ and Te4+. Additionally, the white light-emitting diodes encapsulated by this single matrix white luminescent material exhibit excellent stability. Combined with theoretical calculations, it is elucidated that these high-efficiency emissions are not only derived from the unique electronic transition of ns2 ions but also related to the energy band properties and the crystal field. This work shows that ns2 ions doped RSC vacancy ordered double perovskite can meet the needs of different luminous colors and color temperature tunable white light emission. Meanwhile, it is a strong competitor to replace the lead-based perovskite.
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Affiliation(s)
- Ruxin Liu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Wenjun Zhang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Tianzhuo Wen
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Xue Wen
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Cong Ding
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Zhongfa Li
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Wenbo Yan
- School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
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Yang W, Dang P, Zhang G, Lian H, Li G, Lin J. Tunable Dual Emission in Bi 3+/Te 4+-Doped Cs 2HfCl 6 Double Perovskites for White Light-Emitting Diode Applications. Inorg Chem 2022; 61:5903-5911. [PMID: 35380804 DOI: 10.1021/acs.inorgchem.2c00272] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Multicolor-emission-based single-phase white light derived from different luminescence centers is an effective way to manipulate the optical properties of halide perovskites. In this work, we developed a codoping strategy to incorporate Bi3+ and Te4+ emission centers into all-inorganic lead-free Cs2HfCl6 perovskite by a hydrothermal method. The as-prepared Bi3+/Te4+-doped Cs2HfCl6 microcrystals show bright blue (Bi3+), yellow (Te4+), and warm-white emissions (Bi3+/Te4+), respectively. The broad efficient dual emission in Bi3+/Te4+ co-doped Cs2HfCl6 is assigned to the typical 3P1 → 1S0 transition emission from Bi3+ originating from [BiHf + VCl] and self-trapped excitons (STEs) from Te4+. Moreover, the concentration-optimized Cs2HfCl6:Te4+ shows excellent antiwater stability and high photoluminescence quantum yield (PLQY) of ∼70%. Meanwhile, a white light-emitting diode (WLED) fabricated using Bi3+/Te4+ co-doped Cs2HfCl6 is close to warm white with a color rendering index (CRI) of 75.4, CIE color coordinate of (0.370, 0.393), and a correlated color temperature (CCT) of 4380 K. These results suggest that Bi3+/Te4+ co-doped all-inorganic lead-free Cs2HfCl6 is a potential single-phase white light-emitting phosphor candidate for solid-state lightings.
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Affiliation(s)
- Wei Yang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, P. R. China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Peipei Dang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, P. R. China
| | - Guodong Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, P. R. China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Hongzhou Lian
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, P. R. China
| | - Guogang Li
- Faculty of Materials Science and Chemistry, China University of Geoscience, Wuhan 430074, P. R. China.,Zhejiang Institute, China University of Geosciences, Hangzhou 311305, P. R. China
| | - Jun Lin
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, P. R. China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
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Carrizo AF, Belmonte GK, Santos FS, Backes CW, B Strapasson G, Schmidt LC, Rodembusch FS, Weibel DE. Highly Water-Stable Polymer-Perovskite Nanocomposites. ACS APPLIED MATERIALS & INTERFACES 2021; 13:59252-59262. [PMID: 34851611 DOI: 10.1021/acsami.1c17594] [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
The excellent performance of hybrid metal-halide perovskite nanocrystals (NCs) contrasts with their unsatisfactory stability in a high-humidity environment or water. Herein, polymer composite lead-halide perovskites (LHPs) NCs were prepared by casting or spin-coating to produce a high fluorescence yield and a fully water-resistant material. Poly(l-lactide) (PLla), polypropylene glycol (PPGly), and polysulfone (PSU) commercial polymers were used to prepare suspensions of MAPbBr3-HDA NCs (MA: CH3NH3; HDA: hexadecylamine). The MAPbBr3-HDA@PLla suspension exhibited a maximum fluorescence quantum yield of 93% compared to 43% for the pristine MAPbBr3-HDA NCs. Strong emissions around 528 nm were also observed, with the same full width at half maximum value of 20 nm, demonstrating the successful fabrication of brightly luminescent LHP NCs@polymer combinations. Time-resolved photoluminescence measurements directly observed the enhanced spontaneous emission of the NCs induced by the polymeric environment. However, the cast films of MAPbBr3-HDA NCs mixed with PLla or PPGly did not resist water immersion. On the contrary, MAPbBr3-HDA@PPGly/PSU films containing well-dispersed ∼10 nm LHP NCs retained a bright green fluorescence emission even after 18 months under air conditions or water immersion up to 45 °C. From water contact angle measurements, profilometry, and X-ray photoelectron spectroscopy data, it could be assumed that the slightly hydrophobic PSU polymer is responsible for the high water stability of the fluorescent films, which avoids MAPbBr3-HDA NC degradation. This work shows that the LHP NC dispersion in dissolved commodity polymers holds great promise toward the long-term stability of LHP NC composites for the future development of wearable electronic devices and other waterproof applications.
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Affiliation(s)
- Antonella Florencia Carrizo
- Facultad de Ciencias Químicas, Departamento de Química Orgánica, Universidad Nacional de Córdoba, Av. Haya de la Torre s/n, X5000HUA Córdoba, Argentina
| | - Guilherme K Belmonte
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves, 9500, Bairro Agronomia, CP 15003, CEP: 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
| | - Fabiano S Santos
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves, 9500, Bairro Agronomia, CP 15003, CEP: 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
| | - Claudio W Backes
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves, 9500, Bairro Agronomia, CP 15003, CEP: 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
| | - Guilherme B Strapasson
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves, 9500, Bairro Agronomia, CP 15003, CEP: 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
| | - Luciana C Schmidt
- Facultad de Ciencias Químicas, Departamento de Química Orgánica, Universidad Nacional de Córdoba, Av. Haya de la Torre s/n, X5000HUA Córdoba, Argentina
| | - Fabiano S Rodembusch
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves, 9500, Bairro Agronomia, CP 15003, CEP: 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
| | - Daniel E Weibel
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves, 9500, Bairro Agronomia, CP 15003, CEP: 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
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