发光学报2026，Vol.47Issue(3)：444-452,9.DOI:10.37188/CJL.20250271
超小荧光分子实现单层白光电致发光二极管
Ultra-small Fluorescent Molecules Achieve Single-layer White Electroluminescent Diodes
摘要
Abstract
White organic light-emitting diodes(WOLEDs)are promising candidates for solid-state lighting and full-color display due to their advantages such as energy conservation,thinness,lightness and flexible display.Tradi-tional WOLEDs mostly adopt multi-layer architectures that stack primary-color emitters(red,green,and blue)to achieve white emission.However,these devices suffer from complicated fabrication and high manufacturing costs.Therefore,solution-processed single emissive layer WOLEDs have attracted extensive research attention.In this study,an ultra-small organic fluorescent molecule(4,7-bis(thiophen-2-yl)benzo[c][1,2,5]thiadiazole,TBT)composed solely of a thiadiazole acceptor and a thiophene donor was designed and synthesized,which exhibits a broad yellow-orange emission ranging from 450 nm to 650 nm,with a peak at 560 nm.By blending TBT with poly(N-vinylcarbazole)(PVK)and 1,3-bis(5-(4-tert-butylphenyl)-1,3,4-oxadiazol-2-yl)benzene(OXD-7)in a single emissive layer,we obtain cool-white,pure-white,and warm-white electroluminescence covering 400-650 nm.The optimized device delivers a maximum external quantum efficiency of 2.3%and a peak luminance of 4 000 cd/m².Owing to its low-cost and simple synthesis,solution processability,and high efficiency,this ultra-small fluorescent molecule provides a feasible approach for low-cost lighting and display applications.关键词
荧光分子/溶液加工/发光二极管/单一发光层/白光电致发光Key words
fluorescent molecules/solution processing/light-emitting diodes/single-emitting layer/white electro-luminescence分类
信息技术与安全科学引用本文复制引用
王金江,王益飞,邓艳红,陈自立,曹浩,李楠,袁晓娇,相恒阳..超小荧光分子实现单层白光电致发光二极管[J].发光学报,2026,47(3):444-452,9.基金项目
国家重点研发计划(2024YFB3612400) （2024YFB3612400）
国家自然科学基金(62505081,52131304,U24A20286) （62505081,52131304,U24A20286）
江苏省自然科学基金(BK20240187) （BK20240187）
湖南省大学生创新创业训练计划(S202410546019)Supported by National Key Research and Development Program of China(2024YFB3612400) （S202410546019）
National Natural Science Foun-dation of China(62505081,52131304,U24A20286) （62505081,52131304,U24A20286）
Natural Science Foundation of Jiangsu Province(BK20240187) （BK20240187）
Inno-vation and Entrepreneurship Training Program for College Students in Hunan Province(S202410546019) （S202410546019）
