材料科学
共发射极
光电子学
钙钛矿(结构)
有机发光二极管
二极管
发光二极管
镍
量子效率
载流子产生和复合
猝灭(荧光)
卤化物
图层(电子)
半导体
化学工程
光学
纳米技术
无机化学
荧光
化学
工程类
冶金
物理
作者
Q.M. Zhang,Yingwei Zhao,Xiangqian Qin,Mingliang Li,Haoran Sun,Peng Wang,Wenjing Feng,Yuqing Li,Jianxun Lu,Kebin Lin,Lei Shi,Zhanhua Wei
标识
DOI:10.1002/adfm.202308547
摘要
Abstract Metal halide perovskite light‐emitting diodes (Pero‐LEDs) have gained great attention due to their promising applications in lighting and displays. However, in their conventional three‐layered sandwich structure, some undeserved carrier behaviors, such as imbalanced carrier injection, severe carrier loss, and unstable recombination zone, limit the device's performance. Herein, a four‐layered design by inserting a nickel acetate (Ni(OAc) 2 ) interlayer between the emitter and hole‐transport layer(HTL) to manage carrier behavior and improve radiative recombination efficiency is proposed. Specifically, the Ni(OAc) 2 interlayer is poorly conductive and can partially block the hole injection, making the hole‐electron injection more balanced. And the Ni(OAc) 2 interlayer avoids the direct contact between the perovskite emitter and hole transporter, reducing the interfacial carrier quenching. Moreover, the Ni(OAc) 2 interlayer inhibits the electron‐migrated recombination at the hole transporter interface, confining the carrier recombination zone in the emitter layer. As a result, the corresponding Pero‐LEDs achieve a maximum external quantum efficiency ( EQE max ) of 24.6% with good reproducibility, showing an average EQE max of over 20%.
科研通智能强力驱动
Strongly Powered by AbleSci AI