Highly Stable Metal‐Free Long‐Persistent Luminescent Copolymer for Low Flicker AC‐LEDs

作者：Hongyu Lv, Haitao Tang, Yiyu Cai, Tao Wu, Dong‐Liang Peng, Yuan Yao, Xuhui Xu · 发表于：Angewandte Chemie International Edition · 年份：2022 · DOI：10.1002/anie.202204209 · 被引用次数：36 · 研究领域：Luminescence and Fluorescent Materials、Organic Light-Emitting Diodes Research、Conducting polymers and applications

Organic room-temperature long-persistent luminescent materials are promising light-emitting materials for encryption, architectural decoration, organic solar cells, and biomedical applications. However, their unstable structures and thermal- and humidity-induced emission quenching have greatly limited their utility and reliability. Here, we report a metal-free nonconjugated copolymer that possesses stable photoluminescence at both high temperature and humidity. The room-temperature long-persistent luminescence (LPL) of this copolymer lasts for more than 15 s and can be recovered in high humidity conditions by heating to remove moisture. Copolymer LPL can be achieved with various excitation wavelengths, ranging from ultraviolet to near-infrared, and the LPL color can be adjusted accordingly. The high initial LPL intensity and ultrafast filling time of the copolymer makes it suitable for low flicker alternating current-driven light-emitting diodes (AC-LEDs).