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Lu C, You W. Harnessing solid-state ion exchange for the environmentally benign synthesis of high-efficiency Mn 4+-doped phosphors. Chem Commun (Camb) 2024; 60:5399-5402. [PMID: 38669112 DOI: 10.1039/d4cc01530d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
In this study, a solid-state ion exchange (SSIE) method is proposed to synthesize a series of Mn4+-doped fluoride phosphors, which avoids the use of HF solution during the Mn4+-doping process. The obtained Mn4+-doped fluoride phosphors exhibit strong red emission with a quantum yield of 46%.
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Affiliation(s)
- Changyuan Lu
- School of Environmental Engineering, Yellow River Conservancy Technical Institute, Kaifeng 475004, China
| | - Wenwu You
- School of Physics and Electronics, Henan University, Kaifeng 475004, China.
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Zhang W, Wang Z, Jia S, Zhou Y, Ji H. Millimeter-Sized K 2MnF 6:Si 4+, NH 4+ Red-Luminescent Crystals with High Absorption Efficiency (AE max of 93.5%) and External Quantum Efficiency (EQE max of 68.9%) Grown by Cooling-Induced Crystallization. Inorg Chem 2024; 63:833-841. [PMID: 38115192 DOI: 10.1021/acs.inorgchem.3c03844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Luminescent bulk crystals exhibit fewer grain boundaries and defects compared with conventional microsized powdery ones. Herein, targeting Mn4+-activated fluoride crystals with a sharp line-type red luminescence spectrum, we propose a new cooling-induced crystallization method to grow the fluoride crystals. By this new method, we successfully grew millimeter-sized K2MnF6:Si4+, NH4+ crystals, featuring an AEmax (absorption efficiency) of 93.5% and an EQEmax (external quantum efficiency) of 68.9%, which are among the best values for Mn4+-activated fluoride red phosphors. The influence of doping Si4+ and/or NH4+ in K2MnF6 on the local coordination structure and luminescence properties was studied. The anomalous thermal quenching behaviors were discussed, the luminescence decay from the excited state was compared, and the origin for the high quantum efficiencies was analyzed.
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Affiliation(s)
- Wenrui Zhang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Zhaowu Wang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Intelligent Manufacturing, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Shiyu Jia
- Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528225, China
| | - Yayun Zhou
- Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528225, China
| | - Haipeng Ji
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
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Zhong X, Deng D, Wang T, Li Y, Yu Y, Qiang J, Liao S, Huang Y, Long J. High Water Resistance and Luminescent Thermal Stability of Li yNa (2–y)SiF 6: Mn 4+ Red-Emitting Phosphor Induced by Codoping of Li +. Inorg Chem 2022; 61:5484-5494. [DOI: 10.1021/acs.inorgchem.1c03488] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xue Zhong
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Daishu Deng
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Tianman Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Yuelan Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Yan Yu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Jiawei Qiang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Sen Liao
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China
| | - Yingheng Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China
| | - Jinqiao Long
- Guangxi colleges and Universities Key Subject of Material Physics and Chemistry, College of Chemistry & Environment Engineering, Baise University, Baise, Guangxi 533000, China
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