Excitation-dependent organic persistent luminescence

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2020,（4）
• 页码范围: 423-425
• 页数: 3页
• 语种: 英文

摘要

Organic persistent luminescence (OPL),which maintains obvious photoemission for a period of time after ceasing the external irradiation,has attracted wide attentions in many fields,such as biological imagings,sensors,photodynamic therapies,and molecular optoelectronics.To date,the long excitation-state lifetime and the high photoluminescent quantum yield under ambient conditions have been regarded as the intrinsic parameters for evaluating the OPL performance.For the sake of improving these factors,varied mechanisms have been proposed,including formations of the H-aggregations,crystallization,organic-metal hybrids,and self-assemblies of host-guest matrix.Although a lot of efforts have been put into exploring and extending new types of organic phosphors,achieving versatile OPL materials with the tunable photoemission is still highly desirable,and the examples are very limited.