Open AccessHigh quantum yield of In‐based halide perovskites for white light emission and flexible x‐ray scintillators
Author(s) -
Liang Dehai,
Liu Xiaohui,
Luo Binbin,
Qian Qingkai,
Cai Wensi,
Zhao Shuangyi,
Chen Jiangzhao,
Zang Zhigang
Publication year - 2023
Publication title -
ecomat
Language(s) - English
Resource type - Journals
ISSN - 2567-3173
DOI - 10.1002/eom2.12296
Subject(s) - quantum yield , photoluminescence , materials science , halide , color rendering index , luminescence , optoelectronics , scintillator , doping , full width at half maximum , diode , optics , light emitting diode , analytical chemistry (journal) , chemistry , fluorescence , physics , inorganic chemistry , detector , chromatography
In‐based halides always present low photoluminescence quantum yield (PLQY) because of poor absorption, limiting their potential applications in luminescence‐related fields. In this work, zero‐dimensional MA 4 InCl 7 [MA + : CH 3 NH 3 + ] halides with different Sb 3+ doping level are prepared through solvent evaporating method. The Sb 3+ ‐doped MA 4 InCl 7 shows a broadband yellow emission with full width at half‐maximum of 180 nm and a high PLQY of 84%. Such broadband emission originates from the self‐trapped excitons demonstrated by experimental results and theoretical calculations. Additionally, the Sb 3+ ‐doped MA 4 InCl 7 is further employed to fabricate white‐light‐emitting diodes, which possesses high color rendering index of 91 and excellent operating stability up to 400 h. Moreover, flexible Sb 3+ ‐doped MA 4 InCl 7 films are also prepared as x‐ray scintillators, exhibiting low detection limit of 63.3 nGy air /s and high spatial resolution of 10.0 lp/mm. Thus, this work provides guidance to design perovskite‐based devices with bright luminescence and x‐ray detection with excellent flexibility.