摘要
为了提高有机电致发光器件(OLED)的量子效率,对75%的通常认为是无效激发的三线态激子的利用,成为近年来OLED研究中广受关注的课题。磷光材料在发光过程中可以同时利用单线态和三线态激子,理论上内量子效率可以达到100%,因而这类材料的使用成为提高器件效率的主要途径之一。本文介绍了利用有机三线态发光的有关概念、原理,并就磷光材料的物理掺杂,化学嫁接、能量转移和磷光淬灭等问题,阐述了该领域的研究概况。同时指出,尽管三线态发光材料及器件的性能还存在许多问题,但有机材料灵活的可修饰性赋予研究人员广阔的设计空间,高效率的三线态发光OLED器件的开发将大有可为。
Aiming at improving the quantum efficiency of organic light-emitting devices （OLED）, Electroluminescent devices based on usually thought ineffective triplet-emitting have become an attractive area of research in recent years. Because the internal quantum efficiency of phosphorescent material based OLEDs can reach 100% theoretically owing to availability of both singlet and triplet excitons, utilization of the phosphorescent material in OLEDs has become one of the major approaches of increasing the OLED efficiency. In this review, the primary concepts and principIes are introduced, and the general researches on triplet-emitting based OLEDs are expounded on issues such as physical doping, chemical grafting, energy transferring and emitting quenching of the phosphorescent materials. It is pointed out that the flexibihty in organic molecular modification offers broad spaces for researchers and facilitates improving efficiency of triplet-emitting based OLEDs in the future.
出处
《山东建筑大学学报》
2007年第2期163-173,共11页
Journal of Shandong Jianzhu University
基金
国家自然科学基金(10574082)
山东省自然科学基金(Y2006A18)
山东建筑大学自然基金资助项目(XZ050102)
关键词
有机电致发光器件
三线态
单线态
量子效率
organic light-emitting device
triplet
singlet
quantum efficiency
