White OLED materials

Abstract

White OLEDs are ultrathin, large-area light sources made from organic semicon ductor materials. Over the past decades, much research has been spent on finding suitable materials to realize highly efficient monochrome and thus white OLEDs. White OLED panel efficacy has reached 90 lmW-1, and a tandem white OLED panel has achieved a lifetime of over 100,000 h at 1,000 cdm~2. LG is set to launch a 55" OLED TV in 2013, and OLEDs will be expected to a make bigger breakthrough. Although white OLED panels show superior performance, there is still much room (nearly160 lmW-1) for improvement, in view of the theoretical limit of248 lmW~1. With their high-efficiency, color tunability, and color quality, white OLEDs are emerging as one of the next-generation light sources.