激基复合物有机长余辉材料的研究进展  

Recent progress on exciplex-based organic long-persistence luminescent materials

作　　者：王伟光 张鑫[1] 贺飞 李欢欢[1] 陶冶[1] Weiguang Wang;Xin Zhang;Fei He;Huanhuan Li;Ye Tao(State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM),Nanjing University of Posts&Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学信息材料与纳米技术研究院,有机电子与信息显示国家重点实验室,南京210023

出　　处：《科学通报》2024年第26期3849-3863,共15页Chinese Science Bulletin

基　　金：国家自然科学基金(2322106,22075149);松山湖材料实验室开放课题(2022SLABFN16);有机电子与信息显示国家重点实验室(ZS030GD24002);南京邮电大学华礼人才和大学生创新创业支持计划(202310293174K)资助。

摘　　要：纯有机长余辉材料具有分子结构/功能可调、易加工、不含重金属元素、生物相容性好、可大面积应用以及柔性等优点,在数据加密、生物成像、安全打印等领域得到了广泛的应用,是目前有机光电子学研究的热点之一.基于给体-受体构建的激基复合物长余辉材料具有发光持续时间长、制备简便以及性能可调等优点,成为设计、开发有机长余辉材料的新选择,近年来受到了人们的广泛关注.本文系统地综述了给-受体激基复合物长余辉材料的基本设计理念,并依据受体材料的不同,详细总结了各类高效、稳定的激基复合物长余辉材料体系,探讨了给体和受体分子间的相互作用对其发光持续时间的影响及其结构与性能的关系,总结了激基复合物有机长余辉材料存在的问题,并对其未来发展所面临的挑战和机遇进行了展望.The field of pure organic long-persistence luminescent(LPL)materials has been experiencing a substantial surge of interest owing to its impressive characteristics.These materials offer several advantages,including flexible molecular structures and functionalities,ease of fabrication,freedom from noble metals,excellent biocompatibility,and broad application possibilities.Such attributes make them highly suitable for applications in data encryption,bioimaging,and secure printing,signifying a breakthrough in organic optoelectronics.Despite these advantages,LPL materials have several limitations,such as limited persistence duration,overall lifetime,reduced stability,and efficiency.These issues underscore the urgent need for more comprehensive and focused research on material development,stimulating the exploration of new design strategies to address the current limitations and enhance the performance and applicability of LPL materials.Efficient organic LPL materials can be achieved through strategic molecular design approaches.To enhance the intersystem crossing(ISC)process,various methods have been suggested,e.g.,the addition of heavy atoms,the reduction of the energy gap,hyperfine interaction,and the manipulation of heteroatoms.Creating a rigid environment prevents the nonradiative loss of triplet excitons.This common approach helps shield chromophores from oxygen quenching and minimizes molecular vibrations through H-aggregation,crystallization,host-guest systems,and polymerization.Furthermore,the presence of impurities in pure organic materials with LPL emission can considerably hinder their performance.However,a notable achievement in the field of LPL emission is the development of donor-acceptor exciplex materials.Exciplex-based LPL materials achieve luminescence through effective charge transfer between donor and acceptor molecules;under the excitation of an external light source,electrons transit from the highest occupied molecular orbital of the donor to the lowest unoccupied molecular orbital of the accepto

关 键 词：有机长余辉 激基复合物 给-受体分子体系 持续时间 

分 类 号：TB34[一般工业技术—材料科学与工程]