发光学报2026，Vol.47Issue(8)：1405-1411,7.DOI:10.37188/CJL.20260080
基于缺陷钝化与载流子传输协同优化的高效蓝光钙钛矿发光二极管
Highly Efficient Blue Perovskite Light-emitting Diodes Based on Synergistic Optimization of Defect Passivation and Carrier Transport
摘要
Abstract
Although the performance of perovskite light-emitting diodes(PeLEDs)has seen significant break‑throughs in the red and green spectral bands,achieving efficient blue PeLEDs remains limited by severe non-radia‑tive recombination in the emission layer and unbalanced charge injection.In this study,we propose a bulk-interface synergistic optimization strategy to improve the luminous efficiency of blue PeLEDs.Experimental results show that EABr doping in the quasi-2D perovskite PEA2(CsPbBr3)2PbBr4 blue-shifts the emission spectrum from 519 nm to 480 nm and effectively suppresses non-radiative recombination.Furthermore,PSS-Na is introduced into PEDOT∶PSS to form an m-PEDOT∶PSS/PVK bilayer hole transport structure with PVK.The incorporation of PSS-Na increas‑es the work function of PEDOT∶PSS,thereby reducing the hole injection barrier and enhancing hole transport effi‑ciency.Meanwhile,the carbazole groups in PVK effectively passivate defects in the light-emitting layer and suppress exciton quenching.Based on this bulk-interface synergistic optimization strategy,the luminance of the PeLEDs increases from 258 cd/m2 to 1 087 cd/m2,and the external quantum efficiency(EQE)increases from 4.98%to 12.7%.This work provides a promising pathway for realizing high-performance blue PeLEDs.关键词
蓝光钙钛矿发光二极管/体相-界面协同优化/EABr掺杂/双空穴传输层Key words
blue PeLEDs/bulk-interface synergistic optimization/EABr doping/dual HTL分类
信息技术与安全科学引用本文复制引用
霍修伟,马健豪,朱军,刘海涛,秦毓婕,白志玮,潘江涌..基于缺陷钝化与载流子传输协同优化的高效蓝光钙钛矿发光二极管[J].发光学报,2026,47(8):1405-1411,7.基金项目
国家自然科学基金(62205153) （62205153）
江苏省研究生实践创新计划项目(SJCX25_0509)Supported by National Natural Science Foundation of China(62205153) （SJCX25_0509）
Postgraduate Practice Innovation Program of Jiangsu Province(SJCX25_0509) （SJCX25_0509）
