Efficient Blue Perovskite LEDs via Bottom‐Up Charge Manipulation for Solution‐Processed Active‐Matrix Displays
Abstract
Abstract Perovskite light‐emitting diodes (PeLEDs) are emerging as strong candidates for next‐generation displays due to their outstanding optoelectronic properties, solution processability, and cost‐effectiveness. However, the development of highly efficient blue PeLEDs remains a significant challenge. Here, a bottom‐up strategy is introduced for precise charge manipulation in blue perovskites to enhance radiative recombination efficiency. By employing 1,3‐bis(N‐carbazolyl)benzene as an inserted hole transport layer, improved hole injection efficiency is achieved while effectively suppressing reverse electron transport and exciton quenching. Additionally, a fluorinated ester additive is incorporated to control perovskite crystallization, facilitating the formation of well‐aligned reduced‐dimensional phases to reduce nonradiative recombination losses. The resulting blue PeLEDs exhibit a record‐breaking external quantum efficiency of 25.87%, the highest reported for one‐step‐prepared blue perovskite films. Furthermore, integration with thin‐film transistor circuits enables solution‐processed active‐matrix perovskite displays with sharp and uniform patterning. This work provides a comprehensive pathway for advancing blue PeLEDs toward high‐performance display applications.
Article Details
Authors (15)
Yi Yu
Bing‐Feng Wang
School of Physics and Electronic Science East China Normal University Shanghai 200062 China
Yang Shen
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics
Yu‐Tong Wang
School of Physics East China Normal University Shanghai China
Yu‐Hang Zhang
State Key Laboratory For Physical Chemistry of Solid Surfaces Innovation Laboratory for Sciences and Technologies of Energy Material of Fujian Province (IKKEM) Collaborative Innovation Center of Chemistry for Energy Materials (<i>i</i>ChEM) Engineering Research Center of Electrochemical Technologies of Ministry of Education, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen Fujian China
Ying‐Ying Li
Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou Jiangsu China
Zhen‐Huang Su
Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory Chinese Academy of Sciences Shanghai 200241 China
Long‐Xue Cao
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Soochow University Suzhou 215123 China
Shi‐Chi Feng
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Soochow University Suzhou 215123 China
Yuan‐Hang Wu
School of Physics and Electronic Science East China Normal University Shanghai 200062 China
Xing‐Yu Gao
Shanghai Synchrotron Radiation Facility Zhangjiang Laboratory Chinese Academy of Sciences Shanghai 200241 China
Satoshi Kera
Institute for Molecular Science National Institutes of Natural Sciences, Myodaiji Okazaki 444‐8585 Japan
Nobuo Ueno
Graduate School of Advanced Integration Science Chiba University Chiba 263‐8522 Japan
Jian‐Xin Tang
Jiangsu Key Laboratory For Carbon‐Based Functional Materials & Devices Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou Jiangsu P. R. China
Yan‐Qing Li
School of Physics East China Normal University Shanghai P. R. China