有机半导体照明（有机照明）研究进展-中国材料进展

文章信息/Info

Title:: Recent Developmentsof Lightings Based on Organic Semiconductors (Organic Lighting)

Author(s):: Dongdong Zhang; Yan Zhao; LianDuan; Yong Qiu*; Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry,Tsinghua University, Beijing 10084, China

摘要:: 采用有机发光二极管（OLEDs）的有机半导体照明（有机照明）是绿色环保、健康安全的新型面光源，有望在固态照明领域得到广泛的应用。有机照明的发展是随着有机发光材料的不断进步而进步的。有机发光材料从最初的荧光材料发展到磷光材料以及最近提出的热活化延迟荧光材料，其性能在不断地提升。基于这些材料的白光OLEDs的性能也在不断提升。最早的白光器件基于荧光小分子材料，但是由于只能利用单线态发光效率很低。随后磷光材料的引入使得白光器件的效率大幅度提升，但是由于蓝色磷光材料本身的稳定性问题，全磷光白光器件的寿命较短。为了结合荧光和磷光的优点，人们提出了荧光/磷光杂化的白光器件，这目前是最有前景的一类白光器件结构。目前有机照明的研究，已从早期只关注效率突破阶段，进入到综合提高效率和寿命阶段。本文从荧光白光、磷光白光以及荧光/磷光混合白光三个方面对有机照明的研究状况发展趋势进行了介绍。

Abstract:: Organic lightings based on white light-emitting diodes (WOEDs) are eco-friendly, safe and healthy area light sources, which are promising candidates for solid-state lighting. Development of high performance organic materials is essential to the development of WOLEDs. The performances of organic light-emitting materials have been significantly improved from fluorophors to phosphors, and to fluorophors with thermally activated delayed fluorescence (TADF). Performances of WOLEDs based on those materials are also gradually promoted. The earliest WOLEDs were based on small organic fluorophors. However, since only the singlet excitons can be used, the device efficienciesare low. Soon afterwards, the utilization of phosphors greatly increased the device efficiency. But the lifetimes of the all-phosphor WOLEDs are short due to the material stability issue of the blue phosphors. To combine the advantages of fluorophors and phosphors, hybrid WOLEDs are proposed, which is the most promising method nowadays. Recent researches onWOLEDs arefocused onimprovingthe over-all properties concerning high efficiency and long device lifetime. Here, we will give a reviewabout the development of the WOLEDs, divided into three parts based on the materials used: all fluorophors, all phosphors and fluorophor/phosphor hybrid WOLEDs.