Strategies to Achieve High-Performance White Organic Light-Emitting Diodes

Lirong Zhang; Xiang-Long Li; Dongxiang Luo; Peng Xiao; Wenping Xiao; Yuhong Song; Qinshu Ang; Baiquan Liu

doi:10.3390/ma10121378

Strategies to Achieve High-Performance White Organic Light-Emitting Diodes

Materials (Basel). 2017 Dec 1;10(12):1378. doi: 10.3390/ma10121378.

Authors

Lirong Zhang¹, Xiang-Long Li², Dongxiang Luo³, Peng Xiao⁴, Wenping Xiao⁵, Yuhong Song⁶, Qinshu Ang⁷, Baiquan Liu^{8

9}

Affiliations

¹ Shunde Polytechnic, Foshan 528300, China. loezhang@foxmail.com.
² Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China. xianglonglee@126.com.
³ School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China. luodx@gdut.edu.cn.
⁴ School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528000, China. xiaopeng@fosu.edu.cn.
⁵ Shunde Polytechnic, Foshan 528300, China. xwp556@126.com.
⁶ Shunde Polytechnic, Foshan 528300, China. syhscut@vip.163.com.
⁷ Shunde Polytechnic, Foshan 528300, China. aqshu@sohu.com.
⁸ Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China. l.baiquan@mail.scut.edu.cn.
⁹ LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore. l.baiquan@mail.scut.edu.cn.

Abstract

As one of the most promising technologies for next-generation lighting and displays, white organic light-emitting diodes (WOLEDs) have received enormous worldwide interest due to their outstanding properties, including high efficiency, bright luminance, wide viewing angle, fast switching, lower power consumption, ultralight and ultrathin characteristics, and flexibility. In this invited review, the main parameters which are used to characterize the performance of WOLEDs are introduced. Subsequently, the state-of-the-art strategies to achieve high-performance WOLEDs in recent years are summarized. Specifically, the manipulation of charges and excitons distribution in the four types of WOLEDs (fluorescent WOLEDs, phosphorescent WOLEDs, thermally activated delayed fluorescent WOLEDs, and fluorescent/phosphorescent hybrid WOLEDs) are comprehensively highlighted. Moreover, doping-free WOLEDs are described. Finally, issues and ways to further enhance the performance of WOLEDs are briefly clarified.

Keywords: charge; efficiency; exciton; organic light-emitting diodes; white.

Publication types

Review