串联白光OLED色温调整

Color Temperature Adjustment of Tandem White OLEDs

白光有机电致发光器件(OLED)在实际应用中根据不同的应用场景而有不同的色温要求。该白光OLED具有串联混合结构,包括荧光蓝光发射单元和以Pt磷光材料为客体的黄光发光单元。利用串联器件中存在的弱微腔效应以及所用Pt磷光材料的掺杂特性,通过改变串联结构中空穴传输层的厚度、电荷产生层中n型结构的厚度、调整Pt磷光客体材料在黄光发光单元中的质量分数对串联白光OLED色温进行了调整。通过以上方法,白光OLED的色温可以在3000~10000 K内进行调整,以满足不同的实际应用需求。

White organic light-emitting devices(OLEDs)have different color temperature requirements in practical applications according to different application scenes.The white OLEDs have a tandem hybrid architecture composed of a fluorescent blue light emitting unit and a yellow light emitting unit with Pt phosphorescent material as the object.Based on the weak microcavity effect in tandem devices and the doping properties of the Pt phosphorescent materials,the color temperature of tandem white OLEDs was adjusted by changing the thickness of hole transporting layer in tandem structure,thickness of n-type structure in the charge generating layer and the mass fraction of Pt phosphorescent object materials in the yellow light emitting unit.Through the above methods,the color temperature of the white OLEDs can be adjusted in the range of 3000-10000 K to meet the needs of different practical applications.