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In Situ Growth of 120 cm 2 CH 3 NH 3 PbBr 3 Perovskite Crystal Film on FTO Glass for Narrowband‐Photodetectors
Author(s) -
Rao HuaShang,
Li WenGuang,
Chen BaiXue,
Kuang DaiBin,
Su ChengYong
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201602639
Subject(s) - materials science , perovskite (structure) , trihalide , photodetector , crystal (programming language) , crystallite , optoelectronics , doping , crystallization , tin oxide , analytical chemistry (journal) , crystallography , inorganic chemistry , halide , chemical engineering , chemistry , chromatography , computer science , programming language , metallurgy , engineering
Organometal trihalide perovskites have been attracting intense attention due to their enthralling optoelectric characteristics. Thus far, most applications focus on polycrystalline perovskite, which however, is overshadowed by single crystal perovskite with superior properties such as low trap density, high mobility, and long carrier diffusion length. In spite of the inherent advantages and significant optoelectronic applications in solar cells and photodetectors, the fabrication of large‐area laminar perovskite single crystals is challenging. In this report, an ingenious space‐limited inverse temperature crystallization method is first demonstrated to the in situ synthesis of 120 cm 2 large‐area CH 3 NH 3 PbBr 3 crystal film on fluorine‐doped tin oxide (FTO) glass. Such CH 3 NH 3 PbBr 3 perovskite crystal film is successfully applied to narrowband photodetectors, which enables a broad linear response range of 10 −4 –10 2 mW cm −2 , 3 dB cutoff frequency ( f 3 dB ) of ≈110 kHz, and high narrow response under low bias −1 V.