Reversible photodegradation of organic light-emitting diodes

摘要

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 degreesC. 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/cm(2) of green laser light. (C) 2004 American Institute of Physics.