High efficiency fluorescent white organic light-emitting diodes having a yellow fluorescent emitter sensitized by a blue thermally activated delayed fluorescent emitter

作者：Song Wook; Lee In Ho; Hwang Seok Ho; Lee Jun Yeob^*

来源：Organic Electronics, 2015, 23: 138-143.

DOI：10.1016/j.orgel.2015.04.016

• Quantum efficiency
• White device
• Fluorescent device
• Delayed fluorescence
• Blue device

Fluorescent white organic light-emitting diodes having a blue thermally activated delayed fluorescent emitter and a yellow fluorescent emitter was developed by co-doping the blue and yellow emitters in a single emitting layer. The blue delayed fluorescent device showed high quantum efficiency of 22.6% at a very high doping concentration of 50% and the white devices exhibited a high quantum efficiency of 15.5% even though a fluorescent yellow emitter was doped in the blue thermally activated delayed fluorescent emitting layer. Minimized charge trapping and Dexter energy transfer by low yellow doping concentration of 0.05% as well as efficient Forster energy transfer could develop the high efficiency fluorescent white organic light-emitting diodes.

• 出版日期2015-8