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Green light-emitting diode from bromine based organic-inorganic halide perovskite

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Abstract

Organic-inorganic halide perovskites have attracted considerable attention owing to their outstanding solar cell efficiency. Meanwhile, these halide perovskites exhibit good light emitting in visible and near-infrared range with high fluorescence quantum yield, resulting in electroluminescence. However, it remains challenging for lighting and display due to the low luminance and poor long-term stability. Herein, high performance green light-emitting diodes are fabricated from bromine based perovskite (CH3NH3PbBr3) by systematically adjusting the preparation conditions and optimizing the emitting layer thickness. A high luminance up to 1500 cd m−2 (one of the highest values for perovskites-based light-emitting diodes) was achieved with 80 nm perovskites-emitting layer, due to the well-crystallized, full-coverage property of the films. This result further confirms the great prospect of organic-inorganic perovskites in optoelectronics.

摘要

有机金属卤化钙钛矿(CH3NH3PbX3)作为一种新型的半导体材料在光伏领域引起了广泛的关注. 同时, 有机金属卤化钙钛矿所拥有的光致发光以及较高荧光量子产率为其电致发光提供了可能. 因而, 研究有机金属卤化钙钛矿的电致发光行为对于进一步拓展其在光电领域的应用具有重要意义. 溴化钙钛矿(CH3NH3PbBr3)具备良好的光致发光性能, 具有较高的荧光量子产率, 同时在空气中具有较好的稳定性. 本文挑选CH3NH3PbBr3作为发光层, 借用气体辅助法得到了高质量的CH3NH3PbBr3薄膜, 并成功构建了发光二极管. 基于CH3NH3PbBr3的发光二极管电致发光为536 nm的绿光, 发光亮度达到1000 cd m−2, 外量子效率为0.1%. 该研究对于探索有机金属卤化钙钛矿的电致发光行为大有裨益, 同时也拓宽了有机金属卤化钙钛矿在光电领域的应用潜能.

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Authors and Affiliations

  1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Xiang Qin, Huanli Dong & Wenping Hu

  2. University of Chinese Academy of Sciences, Beijing, 100190, China

    Xiang Qin

Authors
  1. Xiang Qin
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  2. Huanli Dong
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  3. Wenping Hu
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Corresponding authors

Correspondence to Huanli Dong or Wenping Hu.

Additional information

Xiang Qin received his bachelor’s degree in chemistry from Peking University in 2012. He is currently studying for a PhD at the University of Chinese Academy of Sciences and his research interest focuses on organic field-effect transistors.

Huanli Dong was born in 1980. She is an associate professor of the Institute of Chemistry, Chinese Academy of Sciences (ICCAS). She received her MSc degree (2006) in Fujian Institute of Research on the Structure of Material, CAS, and PhD (2009) from the ICCAS. Her research focuses on molecular materials, crystals and devices. She has published more than 80 peer-reviewed papers with citation ∼1800 times.

Wenping Hu received his PhD degree from the ICCAS, in 1999. Then he joined Osaka University and Stuttgart University as a research fellow of Japan Society for the Promotion of Sciences and Alexander von Humboldt, respectively. In 2003 he worked at Nippon Telephone and Telegraph (NTT), and then returned to the ICCAS, and became a full professor in 2003. His research focuses on organic/molecular electronics, and he has published more than 300 peer-reviewed papers with citation ∼9000 times (H index = 51).

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Qin, X., Dong, H. & Hu, W. Green light-emitting diode from bromine based organic-inorganic halide perovskite. Sci. China Mater. 58, 186–191 (2015). https://doi.org/10.1007/s40843-015-0035-4

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  • DOI: https://doi.org/10.1007/s40843-015-0035-4

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