Method for improving the uniformity of emission of an electroluminescent device by irradyating it with light

摘要

A method of improving the uniformity of emission of an organic light emitting device (OLED), wherein the OLED comprises an organic electroluminescent material located between a first electrode for injection of positive charge carriers and a second electrode for injection of negative charge carriers; the method comprising the step of exposing the organic electroluminescent material to a treatment light having a wavelength shorter than the light emitted from said organic electroluminescent material when the OLED is driven, wherein the intensity of the treatment light incident on the organic electroluminescent material is greater than the intensity of ambient light incident on the organic electroluminescent material.