articleNature CommunicationsFeb 8, 2019GOLD OA

Trifluoroacetate induced small-grained CsPbBr3 perovskite films result in efficient and stable light-emitting devices

HWHaoran WangXZXiaoyu ZhangQWQianqian WuFCFan CaoDYDongwen Yang

Shanghai University · City University of Hong Kong · +7 more institutions

PubMed
Indexed incrossrefdoajpubmed

Abstract

Abstract Quantum efficiencies of organic-inorganic hybrid lead halide perovskite light-emitting devices (LEDs) have increased significantly, but poor device operational stability still impedes their further development and application. All-inorganic perovskites show better stability than the hybrid counterparts, but the performance of their respective films used in LEDs is limited by the large perovskite grain sizes, which lowers the radiative recombination probability and results in grain boundary related trap states. We realize smooth and pinhole-free, small-grained inorganic perovskite films with improved photoluminescence quantum yield by introducing trifluoroacetate anions to effectively passivate surface…

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Topics & keywords

Topics
Keywords
  • Perovskite (structure)
  • Light-emitting diode
  • Materials science
  • Quantum yield
  • Photoluminescence
  • Passivation
  • Grain boundary
  • Optoelectronics
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