摘要
上转换发光是一种通过多光子机制将低能量的光转换为高能量光的过程.基于三重态-三重态湮灭的上转换发光所需激发光功率较低、上转化效率较高,因此自20世纪60年代以来就引起了研究人员的广泛关注;然而,由于三重激发态分子会与氧气接触而发生猝灭,一般需要在除去氧气的环境中实现上转换发光,应用范围受到了极大限制,所以研究人员设计了包含有三重态给体与受体基团的聚合物或超分子体系,利用其组装结构的致密性阻隔氧气,从而在空气气氛中实现稳定的上转换发光.综述了近年来三重态-三重态湮灭上转换发光聚合物-超分子体系的研究进展,并探讨了该领域目前存在的问题和今后发展的方向.
Up-conversion luminescence is a process that converts low-energy light into high-energy light through a multi-photon mechanism,and has a wide range of applications in many fields.The up-conversion luminescence based on triplet-triplet annihilation has attracted tremendous research interests since the 1960s,because of its low excitation light power requirement and high up-conversion efficiency.Since oxygen can quench the triplet excited state of the photosensitizer,this up-conversion process is usually performed in an oxygen-free solution.Consequently,researchers have designed supramolecular or polymeric systems with triplet photosensitizer and receptor moieties incorporated,in which the close packing of molecules within the assembled structures prevent the diffusion of oxygen and thus up-conversion in air is realized.This review summarizes the recent research progress in triplet-triplet annihilation upconversion polymeric and supramolecular systems,and briefly describes the current problems in this field and the possible future directions.
作者
郭少玮
李霄羽
GUO Shaowei;LI Xiaoyu(School of Materials Science&Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《河北师范大学学报（自然科学版）》
CAS
2021年第1期61-71,共11页
Journal of Hebei Normal University：Natural Science
基金
国家自然科学基金(NSFC21604004,51973019)。
关键词
三重态-三重态湮灭
上转换发光
聚合物
超分子
triplet-triplet annihilation
up-conversion luminescence
polymer
supramolecule
