Maqola

All‐Inorganic Bismuth‐Based Perovskite Quantum Dots with Bright Blue Photoluminescence and Excellent Stability

Meiying LengWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaYing YangWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaKai ZengWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaZhengwu ChenWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaZhifang TanWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaShunran LiWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaJinghui LiWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaBing XuSchool of Material Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaDeng‐Bing LiWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaMatthew P. HautzingerDepartment of Chemistry University of Wisconsin–Madison 1101 University Avenue Madison WI 53706 USAYongping FuDepartment of Chemistry University of Wisconsin–Madison 1101 University Avenue Madison WI 53706 USATianyou ZhaiSchool of Material Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaLing XuWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaGuangda NiuWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 ChinaSong JinDepartment of Chemistry University of Wisconsin–Madison 1101 University Avenue Madison WI 53706 USAJiang TangWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430074 China

2017en

ABI

Annotatsiya

Abstract Lead halide perovskite quantum dots (QDs) possess color‐tunable and narrow‐band emissions and are very promising for lighting and display applications, but they suffer from lead toxicity and instability. Although lead‐free Bi‐based and Sn‐based perovskite QDs (CsSnX 3 , Cs 2 SnX 6 , and (CH 3 NH 3 ) 3 Bi 2 X 9 ) are reported, they all show low photoluminescence quantum yield (PLQY) and poor stability. Here, the synthesis of Cs 3 Bi 2 Br 9 perovskite QDs with high PLQY and excellent stability is reported. Via a green and facile process using ethanol as the antisolvent, as‐synthesized Cs 3 Bi 2 Br 9 QDs show a blue emission at 410 nm with a PLQY up to 19.4%. The whole series of Cs 3 Bi 2 X 9 (X = Cl, Br, and I) QDs by mixing precursors can cover the photoluminescence emission range from 393 to 545 nm. Furthermore, Cs 3 Bi 2 Br 9 QDs show excellent photostability and moisture stability due to the all‐inorganic nature and the surface passivation by BiOBr, which enables the one‐pot synthesis of Cs 3 Bi 2 Br 9 QD/silica composite. A lead‐free perovskite white light‐emitting diode is fabricated by simply combining the composite of Cs 3 Bi 2 Br 9 QD/silica with Y 3 Al 5 O 12 phosphor. As a new member of lead‐free perovskite QDs, Cs 3 Bi 2 Br 9 QDs open up a new route for the fabrication of optoelectronic devices due to their excellent stability and photophysical characteristics.

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Identifikatorlar

DOI: 10.1002/adfm.201704446

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