王照奎教授课题组在ACS Nano上发表论文

题目：

In-Situ Hydrolysis of Phosphate Enabling Sky-Blue Perovskite Light-Emitting Diode with EQE Approaching 16.32%

作者：

Yu-Han Li¹, Yu Xia¹, Zhipeng Zhang², Bin Wang¹, Run-Jun Jin¹, Chun-Hao Chen¹, Jing Chen¹, Kai-Li Wang¹, Gui-Chuan Xing², Zhao-Kui Wang¹,* and Liang-Sheng Liao¹

单位：

¹Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, China.

²Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa 999078 Macao SAR, China.

摘要：

The performance of blue perovskite light-emitting diodes (PeLEDs) lags behind the green and red counterparts owing to high trap density and undesirable red shift of the electroluminescence spectrum under operation conditions. Organic molecular additives were employed as passivators in previous reports. However, most commonly have limited functions, making it challenging to effectively address both efficiency and stability issues simultaneously. Herein, we reported an innovatively dynamic in situ hydrolysis strategy to modulate quasi-2D sky-blue perovskites by the multifunctional passivator phenyl dichlorophosphate that not only passivated the defects but also underwent in situ hydrolysis reaction to stabilize the emission. Moreover, hydrolysis products were beneficial for low-dimensional phase manipulation. Eventually, we obtained high-performance sky-blue PeLEDs with a maximum external quantum efficiency (EQE) of 16.32% and an exceptional luminance of 5740 cd m^–2. More importantly, the emission peak of devices located at 485 nm remained stable under different biases. Our work signified the significant advancement toward realizing future applications of PeLEDs.

影响因子：

18.027

分区情况：

一区

链接：

https://pubs.acs.org/doi/10.1021/acsnano.3c12131