Open AccessInterfacial “Anchoring Effect” Enables Efficient Large‐Area Sky‐Blue Perovskite Light‐Emitting Diodes
Author(s) -
Shen Yang,
Wang JingKun,
Li YanQing,
Shen KongChao,
Su ZhenHuang,
Chen Li,
Guo MingLei,
Cai XiaoYi,
Xie FengMing,
Qian XiaoYan,
Gao Xingyu,
Zhidkov Ivan S.,
Tang JianXin
Publication year - 2021
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202102213
Subject(s) - perovskite (structure) , materials science , optoelectronics , diode , sky , quantum efficiency , light emitting diode , interface (matter) , chemistry , composite material , physics , crystallography , capillary number , capillary action , astrophysics
Abstract While tremendous progress has recently been made in perovskite light‐emitting diodes (PeLEDs), large‐area blue devices feature inferior performance due to uneven morphologies and vast defects in the solution‐processed perovskite films. To alleviate these issues, a facile and reliable interface engineering scheme is reported for manipulating the crystallization of perovskite films enabled by a multifunctional molecule 2‐amino‐1,3‐propanediol (APDO)‐triggered “anchoring effect” at the grain‐growth interface. Sky‐blue perovskite films with large‐area uniformity and low trap states are obtained, showing the distinctly improved radiative recombination and hole‐transport capability. Based on the APDO‐induced interface engineering, synergistical boost in device performance is achieved for large‐area sky‐blue PeLED (measuring at 100 mm 2 ) with a peak external quantum efficiency (EQE) of 9.2% and a highly prolonged operational lifetime. A decent EQE up to 6.1% is demonstrated for the largest sky‐blue device emitting at 400 mm 2 .