文献类型：期刊文献

英文题名：Thermal Modulation of Exciton Recombination for High-Temperature Ultra-Long Afterglow

作者：Jiang, Ping[1,2];Ding, Bingbing[1,2];Yao, Jiayi[1,2];Zhou, Lei[1,2];He, Zhenyi[1,2];Huang, Zizhao[1,2];Yin, Chenjia[1,2];Tian, He[1,2];Ma, Xiang[1,2]

机构：[1]East China Univ Sci & Technol, Inst Fine Chem, Frontiers Sci Ctr Materi Obiol & Dynam Chem, Sch Chem & Mol Engn,Dept Key Lab Adv Mat, Meilong Rd 130, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materi Obiol & Dynam Chem,Sch C, Meilong Rd 130, Shanghai 200237, Peoples R China

年份：2025

卷号：64

期号：10

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20250217650410);WOS:【SCI-EXPANDED(收录号:WOS:001390503500001)】；

基金：We gratefully acknowledge the financial support from the National Natural Science Foundation of China (22125803, T2488302, 22020102006 and 22205062), Science and Technology Commission of Shanghai Municipality (grant No.24DX1400200), major projects supported by the Guangxi department of science and technology (AA23062016), and Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Energy transfer; Exciton recombination; High-temperature afterglow; Materials science; Room-temperature phosphorescence

摘要：Developing smart materials with tunable high-temperature afterglow (HTA) luminescence remains a formidable challenge. This study presents a metal-free doping system using boric acid as matrix and polycyclic aromatic hydrocarbons as dopants. This composition achieves dynamically tunable afterglow combining a bright blue HTA lasting for over ten seconds even at 150 degrees C and an ultra-long yellow room-temperature phosphorescence below 110 degrees C. The observed HTA is attributed to the thermally released exciton recombination within the dopant molecules, which shows excellent temperature tolerance compared to traditional triplet related phosphorescence and thermally activated delayed fluorescence. The planarity of dopants is extensively investigated playing a pivotal role in modulating Dexter electron transfer (ET) for capturing released electrons and thereby affecting the overall performance of tunable HTA. This work provides an efficient and universal doping strategy to engineer tunable HTA through the synergistic action of thermally releasing electrons, Dexter ET and exciton recombination.