Ultra-long room temperature phosphorescence of indium-based organic inorganic metal halides for naked-eye-visible afterglow  

作　　者：Heng Yu Hao Gong Zhaorui Hua Yang Zhang Wenming Sun Shuyan Gong Ganglong Cui Yang Tian Hongbing Fu 

机构地区：[1]Beijing Key Laboratory for Optical Materials and Photonic Devices,Department of Chemistry,Capital Normal University,Beijing 100048,China [2]Key Laboratory of Theoretical and Computational Photochemistry,Ministry of Education,College of Chemistry,Beijing Normal University,Beijing 100875,China

出　　处：《Science China Chemistry》2023年第9期2576-2582,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(52172096,22090022,21873065,21833005,and 21790364);the Ministry of Science and Technology of China(2018YFA0704805,2018YFA0704802)。

摘　　要：Solid-state molecules based on room-temperature phosphorescent(RTP)emission have received extensive attention due to their special optical properties of triplet excitons.However,there are still few solid molecular systems with naked-eye-visible afterglow characteristics.Herein,we introduce 4-phenylbenzylamine(namely PBA)with a long conjugated system into common non-toxic In^(3+)to form an indium-based organic inorganic halide,whose chemical formula is PBA_(3)[InCl_6]·H_(2)O.Interestingly,this hybrid halide generates a RTP emission at 617 nm with a lifetime decay as long as 290.4 ms,expressing a naked-eye-visible afterglow for more than 7 s.The mechanism study shows that the long lifetime RTP originated from the specific lamellar stacking of organic molecules and metal halide units,facilitating the interaction between the inorganic layers and organic layers.Therefore,the material can be potentially used in emergency lighting,information security,and other fields.Meanwhile,this work provides a reference for the design and implementation of a more efficient organic-inorganic hybrid system with the ultralong RTP emission.

关 键 词：PHOSPHORESCENCE INDIUM 4-phenylbenzylamine HALIDE AFTERGLOW 

分 类 号：TB34[一般工业技术—材料科学与工程]