华南理工大学 材料科学与工程学院，分子聚集发光中心，高分子光电材料与器件研究所，广东省分子聚集发光重点实验室，发光材料与器件国家重点实验室，广东 广州 510640
有机发光二极管（OLEDs）是基于有机半导体的发光器件，由于具有自发光、响应速度快、发光颜色可调、轻薄、大面积柔性可弯曲等优点，被认为是新一代的显示和照明技术。OLEDs是通过注入的电子和空穴复合形成激子并辐射发光的过程，因此如何有效利用激子，特别是三线态激子，已经成为OLEDs材料和器件研究的重要课题。其中，如何把三线态激子能量转换成单线态激子，并最终实现100%激子的荧光发射更具有应用价值，最近几年这方面的研究已经取得了显著进展。本文从OLEDs的工作原理和发光过程出发，详细介绍了制备高效率荧光OLEDs的有效方法及其最新进展，并对未来发展方向进行了展望，为OLEDs材料和器件的研究提供重要参考。
有机发光 激子 高效利用 单线态和三线态 organic light-emitting excitons efficient utilization singlet and triplet states
1 Institute of Polymer Optoelectronic Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
2 Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
Frontiers of Optoelectronics
2022, 15(1): s12200
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences,University of the Chinese Academy of Sciences, Changchun 130022, China
High efficient yellow organic light emitting diodes (OLEDs) based on exciplex were reported. The exciplex was formed by 4, 4′, 4′′-tris [3-methylphenyl (phenyl) amino]-triphenylamine (m-MTDATA) and 4, 7- diphenyl-1, 10-phenanthroline (BPhen). The resulting yellow OLEDs exhibited an external quantum efficiency of over 7%, which is attributed to the effective energy back transfer from exciplex triplet state to exciplex singlet state. The maximum power efficiency of 25 lm/W was achieved. Doping a yellow phosphor Ir(bt)2(acac) into m-MTDATA: BPhen blend, a high efficiency device was achieved with a turn-on voltage of 2.1 V, maximum power efficiency and external quantum efficiency of 86.1 lm/W and 20.7%, respectively.
organic light-emitting diodes (OLEDs) organic light-emitting diodes (OLEDs) fluorescent fluorescent exciplex exciplex Frontiers of Optoelectronics
2015, 8(4): 439
Dept. of Elec. Eng., Jilin University, Changchun 130023, CHN
