文献类型：期刊文献

英文题名：Inorganic salt recrystallization strategy for achieving ultralong room temperature phosphorescence through structural confinement and aluminized reconstruction

作者：Liang, Li Ya[1];Chen, Bin Bin[1,2];Wang, Yue[1];Gao, Ya Ting[1];Chang, Shuai[1];Liu, Meng Li[2];Li, Da Wei[1]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai Key Lab Funct Mat Chem, Sch Chem & Mol Engn,Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Chinese Univ Hong Kong, Shenzhen Inst Aggregate Sci & Technol, Sch Sci & Engn, Shenzhen CUHK Shenzhen, 2001 Longxiang Blvd, Shenzhen 518172, Guangdong, Peoples R China

年份：2023

卷号：649

起止页码：445

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20232614305757);WOS:【SCI-EXPANDED(收录号:WOS:001032945800001)】；

基金：The authors appreciate the financial support from the National Natural Science Foundation of China (21974046, 22176058, and 21977031) and the Fundamental Research Funds for the Central Universities (222201717003).

语种：英文

外文关键词：Rare earth microsphere; Room temperature phosphorescence; Inorganic salt heating recrystallization; Structural confinement; Duplex heavy atom effects; Aluminized reconstruction

摘要：Achieving highly efficient and stable room temperature phosphorescence (RTP) with ultralong lifetime is critical for the multi-purpose applications of phosphorescent materials. In this work, we propose an inorganic salt heating recrystallization strategy to simultaneously improve the lifetime, quantum efficiency, and stability of phosphorescent scandium/leucine microspheres (Sc/Leu-MSs). Inorganic salt-treated Sc/Leu-MSs are obtained by simply heating and drying inorganic salt solution containing Sc/Leu-MSs, which can achieve a maximum lifetime increase of 4.42-times from 208.37 ms (Sc/Leu-MSs) to 920.08 ms (Al2(SO4)3-treated Sc/Leu-MSs), accompanied by a RTP intensity increase up to 24.08-times. The enhancement mechanism of RTP efficiency is attributed to the stabilization of triplet excitons caused by inorganic salt coating that suppresses molecular motion and isolates oxygen on the one hand, and the efficient intersystem crossing promoted by aluminized reconstruction-caused duplex heavy atom effects on the other hand. This study provides new design principle and a facile strategy to construct RTP materials with ultralong lifetime, high phosphorescent quantum efficiency, and high stability for promising applications such as anti-counterfeiting and light emitting diodes.