有机层厚度变化的有机电致发光器件与微腔器件光谱分析

Spectral Analysis of Organic/Microcavity Organic Light-Emitting Devices with the Change in Thickness of Organic Layer

设计中心波长为520nm,改变有机层厚度,即空穴传输层NPB和发光层Alq3的厚度,分别由10nm逐渐增加至100nm,器件的总体厚度也随着改变,分别计算模拟出有机电致发光器件(OLED)和微腔有机电致发光器件(MOLED)的电致发光谱(EL),并对光谱的积分强度、峰值强度、半峰全宽、峰值位置的三维分布图进行比较分析。综合考虑光谱的峰值位置(中心波长)、最大的峰值强度和积分强度(与亮度、效率相关)、最小半峰全宽(色纯度高)进行合理的设计,可以找到最佳厚度。发现:NPB和Alq3的厚度分别为70和62nm时,器件性能最佳,并且微腔器件的结果尤为明显。结果表明,通过模拟计算,可以深入探索MOLED和OLED发光特性,设计出合理的器件结构。

Organic light-emitting devices（OLEDs） with emi ssion peak at 520 nm were designed.The electroluminescence（EL） spectra includi ng the integrated intensity,the peak width at half height,and the intensity an d the position of the peak of the EL spectra of the OLEDs and microcavity OLEDs （MOLEDs）,the total thickness of organic layers which is changeable,were calcul ated and theoretically analyzed with the thickness of the layer of NPB and light-emitting layer of Alq3 ranging from 10 to 100 nm,respectively.According t o these studies,it was found that the optimized OLEDs should be constructed wit h 70 nm NPB and 62 nm Alq3,and this structure should be more suitable to conf igurate the MOLEDs.These results suggest that the suitable structure of OLEDs/M OLEDs could be designed with help of theoretical calculation,which is also help ful to the light-emitting properties of OLEDs and MOLEDs.