Progress of white organic light-emitting device

White organic light-emitting device (OLED) has potential of producing highly efficient saturated white light with the advantages of low-driving voltage, large area available, and flexible display, hence presenting many potential applications in solid state lighting and display industry. At present, the architecture of white OLED device includes mainly single emission layer, multilayer, down-conversion, stacked OLED, etc. which possess their own benefits, and it has attracted much attention respectively. In this paper after introducing the performance standards of white light, we review the development of white OLED in the aspects of architecture and performance. After that, we summarize the approaches to obtaining the high-performance white OLED. Meanwhile, we discuss the challenges to improving white OLED performance. Finally we look forward to the development of white OLED in the future.