Dual-functional additive of cesium ion for achieving ultrahigh efficiency of persistent phosphorescence in existing polymer-based materials  

作　　者：Yao Liu Jinzheng Chen Yiling Miao Kaimin Zhang Faxu Lin Huahua Huang Lina Zhang Zhan Yang Yi Zhang Zhenguo Chi Zhiyong Yang 

机构地区：[1]Key Laboratory for Polymeric Composite&Functional Materials of Ministry of Education,Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films,Guangdong Basic Research Center of Excellence(GBRCE)for Functional Molecular Engineering,School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China [2]School of Materials Science and Engineering,Sun Yat-sen University,Guangzhou 510275,China [3]College of Materials Science and Engineering,Hebei University of Engineering,Handan 056038,China [4]School of Environmental and Chemical Engineering,Wuyi University,Jiangmen 529020,China

出　　处：《Science China Chemistry》2025年第2期754-762,共9页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China(52073315,52373199,and 22375222);Natural Science Foundation of Guangdong(2023A1515012679 and 2023A1515011308);Guangdong Provincial Department of Science and Technology(2021B1212050005 and 2021A1515110453);Fundamental Research Funds for the Central Universities,Sun Yat-sen University(23yxqntd002).

摘　　要：Despite great achievements obtained for polymer-based room-temperature phosphorescence(RTP)materials,the limited efficiencies of persistent RTP still hinder their development.Herein,a simple and universal strategy of using the dual-functional additive of Cs+was presented,which could simultaneously enhance the efficiency(Φp)and maintain the long lifetime(τp)of RTP in existing polymer-based systems with various phosphors and polymers.Among them,the commercial emitter(TpB)-doped polyvinyl alcohol(PVA)/Cs_(2)CO_(3) system possessed an extremely high Φp up to 75.5% and still maintained a longτp of 2.13 s,by introducing the heavy-atom effect and an extra network of ionic bonding through the Cs+additive.Additionally,the temperature resistance of RTP in TpB@PVA/Cs+film could also be improved to 85℃.More satisfactorily,the efficiency of Förster resonance energy transfer(FRET)from RTP to near-infrared(NIR)was also remarkably enhanced in the multi-component systems.This work provides a simple and universal strategy for developing polymer systems with high RTP performance.

关 键 词：persistent phosphorescence cesium carbonate EFFICIENCY heavy-atom effect ionic interaction 

分 类 号：O631.5[理学—高分子化学]