Triplet-triplet annihilation upconversion materials as electrophoretic inks  

作　　者：Qiaoyu Zhang Guiwen Luo Jinping Chen Tianjun Yu Rui Hu Guoqiang Yang Yi Zeng Yi Li 

机构地区：[1]Key Laboratory of Photochemical Conversion and Optoelectronic Materials,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]Key Laboratory of Photochemistry,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Chemical Letters》2024年第3期439-442,共4页中国化学快报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(Nos.22273117,22273110 and 22090012)。

摘　　要：Luminescent materials that can be reversibly switched by electric field stimulation are attractive since the potential application for optoelectronic devices.Here we report a triplet-triplet annihilation upconversion(TTA-UC)system with electrophoretic response which is developed as the electrophoretic ink.The TTA-UC system consists of an ionic derivative of 9,10-diphenyl anthracene(DPA)as the annihilator and Pt(II)octaethylporphyrin(PtOEP)as the sensitizer.Upon applying an electric field,migration and enrichment of positively charged DPA derivatives towards the cathode results in a 20%enhancement of TTA-UC.A quasi-solid film for electrically writing is made using the electrophoretic TTA system as the ink and a platinum electrode as a pen.The prototype of TTA-UC ink demonstrates unique luminescence functions upon electrically writing and erasing,providing a promising strategy to develop electronic devices for display,information storage and encryption.

关 键 词：Triplet-triplet annihilation Photon upconversion ELECTROPHORESIS Electrophoretic ink Luminescence display 

分 类 号：TB34[一般工业技术—材料科学与工程]