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Deep Blue Layered Lead Perovskite Light‐Emitting Diode
Author(s) -
Yan Siyu,
Tian Wanli,
Chen Hua,
Tang Kaixin,
Lin Tingting,
Zhong Gaoyu,
Qiu Longzhen,
Pan Xiaoyong,
Wang Weizhi
Publication year - 2021
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.202001709
Subject(s) - perovskite (structure) , materials science , photoluminescence , light emitting diode , optoelectronics , brightness , halide , diode , quantum yield , quantum efficiency , deep blue , blue light , lead (geology) , luminescence , optics , photochemistry , inorganic chemistry , fluorescence , crystallography , physics , chemistry , geomorphology , geology
Abstract The perovskite light‐emitting diode (PeLED) based on lead has the advantages of excellent purity, high efficiency, and good brightness. In order to develop a highly luminescent and deep blue lead halide perovskite light emitting diode, here, a two‐dimensional layered lead perovskite owning the high deep blue photoluminescence quantum yield 80% at 445 nm is reported. In addition, the maximum recording brightness and the peak external quantum efficiency of the PeLED is 1315 cd m −2 and 3.08%, respectively, which outdoes that of previously reported deep blue lead PeLEDs. The half‐life of the device reaches 3.5 h at 5 V. This work clearly shows that the layered lead perovskite will provide a route to fabricate stable and high‐performance deep blue emission PeLEDs.