Lv Hongyu, Tang Haitao, Cai Yiyu, Wu Tao, Peng Dongliang, Yao Yuan, Xu Xuhui
College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, P. R. China.
Ningbo Cuiying Chemical Technology Co., Ltd, Ningbo, 315000, P. R. China.
Angew Chem Int Ed Engl. 2022 Jul 25;61(30):e202204209. doi: 10.1002/anie.202204209. Epub 2022 Jun 9.
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).
有机室温长余辉发光材料是用于加密、建筑装饰、有机太阳能电池和生物医学应用的有前途的发光材料。然而，它们不稳定的结构以及热和湿度引起的发射猝灭极大地限制了它们的实用性和可靠性。在此，我们报道了一种无金属非共轭共聚物，其在高温和高湿度下均具有稳定的光致发光。这种共聚物的室温长余辉发光（LPL）持续超过15秒，并且在高湿度条件下可通过加热去除水分而恢复。共聚物LPL可以通过从紫外到近红外的各种激发波长实现，并且LPL颜色可以相应地调节。该共聚物的高初始LPL强度和超快填充时间使其适用于低闪烁交流电驱动发光二极管（AC-LED）。
