发光学报2025，Vol.46Issue(11)：2046-2054,9.DOI:10.37188/CJL.20250164
基于激发态分子内质子转移橙光热激子材料的OLED器件及性质研究
Orange-emissive OLEDs Based on An Excited-state Proton Transfer Hot Exciton Fluorophore
摘要
Abstract
An orange-emitting excited-state intramolecular proton transfer(ESIPT)fluorophore,HBT-TPA has been developed,exhibiting hot exciton character.This material utilizes 2-(2′-hydroxyphenyl)benzothiazole(HBT)as the ESIPT unit,modified with the strong electron-donating group of triphenylamine,enabling the emitter some charge transfer characteristics.This results in the excited states of its enol and keto isomers both exhibiting hybrid-ized local and charge transfer(HLCT)characters.The OLED based on the HBT-TPA emitter presented prominent orange emission,with its electroluminescent(EL)spectrum peaking at 576 nm,corresponding to Commission Inter-nationale de l′Éclairage(CIE)coordinates of(0.500 7±0.001 6,0.488 3±0.000 8).The device achieved a maxi-mum external quantum efficiency(EQE)and current efficiency(CE)of 2.0％and 5.0 cd/A,respectively.Nota-bly,the exciton utilization efficiency of the device reaches 29.3％-43.9％,owing to hot exciton mechanism via high-lying reverse intersystem crossing(hRISC)in the keto tautomer of HBT-TPA.关键词
有机电致发光二极管/激发态分子内质子转移/热激子/反向系间窜越Key words
organic light-emitting diodes/excited-state intramolecular proton transfer/hot exciton/reverse intersys-tem crossing分类
数理科学引用本文复制引用
沈可,侯伟,李毅杰,刘宇建,钱妍..基于激发态分子内质子转移橙光热激子材料的OLED器件及性质研究[J].发光学报,2025,46(11):2046-2054,9.基金项目
国家自然科学基金(62175115)Supported by National Natural Science Foundation of China(62175115) （62175115）
