Controlling Synergistic Oxidation Processes for Efficient and Stable Blue Thermally Activated Delayed Fluorescence Devices

Adv Mater. 2016 Sep;28(35):7620-5. doi: 10.1002/adma.201602127. Epub 2016 Jun 23.

Abstract

Efficient sky-blue organic light-emitting diodes (OLEDs) employing thermally activated delayed fluorescence (TADF) display a three orders of magnitude increase in lifetime, which is superior to those of controlled phosphorescent OLEDs used in this study. The combination of electro-oxidation and photo-oxidation of the TADF emitters in their triplet excited-states is suppressed through molecule design and device engineering.

Keywords: OLEDs; TADF; degradation mechanisms; lifetime; synergistic oxidation.