Highly Luminescent Cesium Lead Halide Perovskite Nanocrystals Stabilized in Glasses for Light-Emitting Applications

被引：251
作者：
Ye, Ying [1 ]
Zhang, Wenchao [1 ]
Zhao, Zhiyong [1 ]
Wang, Jing [1 ]
Liu, Chao [1 ]
Deng, Zhao [2 ]
Zhao, Xiujian [1 ]
Han, Jianjun [1 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, 122 Luoshi Rd, Wuhan 430070, Hubei, Peoples R China
[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, 122 Luoshi Rd, Wuhan 430070, Hubei, Peoples R China
来源：
ADVANCED OPTICAL MATERIALS | 2019年 / 7卷 / 09期
基金：
中国国家自然科学基金;
关键词：
glass; light-emitting device; perovskite nanocrystal; stability; CSPBBR3 QUANTUM DOTS; OPTICAL-PROPERTIES; ANION-EXCHANGE; DEFECT-TOLERANCE; ROOM-TEMPERATURE; SILICATE GLASS; CSPBX3; BR; SIZE; PHOTOLUMINESCENCE;
D O I：
10.1002/adom.201801663
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cesium lead halide (CsPbX3) nanocrystals have great potential for photovoltaic and optoelectronic applications, but they are sensitive to oxygen, moisture, and light irradiation. Embedding these CsPbX3 nanocrystals into all-inorganic amorphous solid matrices such as glass is expected to improve their stability. In this work, CsPbX3 nanocrystals are precipitated in boro-germanate glasses with tunable composition, absorption, and photoluminescence. Quantum efficiency of CsPbBr3 nanocrystals in glass can be as high as approximate to 80% and approximate to 20% for CsPb(Cl/Br)(3) and CsPb(Br/I)(3) nanocrystals, respectively. Thermo- and photostabilities of CsPbX3 nanocrystals in glass are greatly improved due to the inert nature of glasses, and intense laser irradiation-induced damage to CsPbX3 nanocrystals is recoverable through thermal annealing. With CsPbBr3 nanocrystal-embedded glass slices, a green light-emitting device with a luminous efficiency of approximate to 120 lm W-1 and an external quantum yield of approximate to 30% is achieved. A white-light-emitting device consisting of CsPbBr3 nanocrystals and CsPb(Br/I)(3) nanocrystal-embedded glass slices shows luminous efficiency in the range of 50-60 lm W-1 and external quantum yield of 20-25%. The thermo- and photostabilities along with the chemical stability of CsPbX3 nanocrystal-embedded glasses are promising materials for photoluminescence related applications.
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页数：11
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