Reversible photodegradation of organic light-emitting diodes

Kobrin, P.; Fisher, R.; Gurrola, A.
September 2004
Applied Physics Letters;9/20/2004, Vol. 85 Issue 12, p2385
Academic Journal
A phenomenon in which the electroluminescence from an organic light-emitting diode is suppressed by the absorption of visible light is reported. This at-least partially reversible degradation has a recovery time measured in days at a temperature of 20°C. The absorbed light affects both the I-V characteristics of the device and the electroluminescent quantum efficiency. The degradation is first order in exposure intensity and has been observed in red, green, and blue devices with exposure to as little as 1 W/cm2 of green laser light.


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