Alam Parvej, Leung Nelson L C, Liu Junkai, Cheung Tsz Shing, Zhang Xuepeng, He Zikai, Kwok Ryan T K, Lam Jacky W Y, Sung Herman H Y, Williams Ian D, Chan Christopher C S, Wong Kam Sing, Peng Qian, Tang Ben Zhong
Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, 999077, China.
School of Science, Harbin Institute of Technology, Shenzhen, HIT Campus of University Town, Shenzhen, 518055, China.
Adv Mater. 2020 Jun;32(22):e2001026. doi: 10.1002/adma.202001026. Epub 2020 Apr 22.
Because of their innate ability to store and then release energy, long-persistent luminescence (LPL) materials have garnered strong research interest in a wide range of multidisciplinary fields, such as biomedical sciences, theranostics, and photonic devices. Although many inorganic LPL systems with afterglow durations of up to hours and days have been reported, organic systems have had difficulties reaching similar timescales. In this work, a design principle based on the successes of inorganic systems to produce an organic LPL (OLPL) system through the use of a strong organic electron trap is proposed. The resulting system generates detectable afterglow for up to 7 h, significantly longer than any other reported OLPL system. The design strategy demonstrates an easy methodology to develop organic long-persistent phosphors, opening the door to new OLPL materials.
由于其固有的储存和释放能量的能力，长余辉发光（LPL）材料在生物医学、诊疗学和光子器件等广泛的多学科领域引起了强烈的研究兴趣。尽管已经报道了许多余辉持续时间长达数小时甚至数天的无机LPL体系，但有机体系在达到类似的时间尺度方面一直存在困难。在这项工作中，提出了一种基于无机体系成功经验的设计原则，即通过使用强有机电子陷阱来制备有机LPL（OLPL）体系。由此产生的体系能产生长达7小时的可检测余辉，明显长于其他任何已报道的OLPL体系。该设计策略展示了一种开发有机长余辉磷光体的简便方法，为新型OLPL材料打开了大门。
