The Role of Homolytic Reactions in the Intrinsic Degradation of OLEDs
In the more than 20 years since the invention of organic light-emitting diodes (OLEDs) by Tang and Van Slyke , durability remains one of the most serious issues hindering wide commercial acceptance of OLED technology . In general, durability is meaningful only in the context of a specifi c application. For example, a tolerable decrease in the brightness of an OLED device designed for lighting may be completely unacceptable in a display application because of pixel-to-pixel differences and static image burn-in. On the other hand, a complete catastrophic failure of a single pixel may be hardly noticeable in a display, yet it is likely to render a lighting device unusable.