光谱学与光谱分析, 2012, 32 (1): 69, 网络出版: 2012-02-20
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
有机电致发光器件 光学微腔 厚度 模拟计算 Organic light-emitting devices Optical microcavity Thickness Theoretical calculation
摘要
设计中心波长为520 nm, 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10 nm逐渐增加至100 nm, 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62 nm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。
Abstract
Organic light-emitting devices (OLEDs) with emission peak at 520 nm were designed. The electroluminescence (EL) spectra including the integrated intensity, the peak width at half height, and the intensity and 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 calculated 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 to these studies, it was found that the optimized OLEDs should be constructed with 70 nm NPB and 62 nm Alq3, and this structure should be more suitable to configurate the MOLEDs. These results suggest that the suitable structure of OLEDs/MOLEDs could be designed with help of theoretical calculation, which is also helpful to the light-emitting properties of OLEDs and MOLEDs.
张春玉, 王成, 肖力光, 陆景彬, 王洪杰, 孔令炜. 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[J]. 光谱学与光谱分析, 2012, 32(1): 69. ZHANG Chun-yu, WANG Cheng, XIAO Li-guang, LU Jing-bin, WANG Hong-jie, KONG Ling-wei. Spectral Analysis of Organic/Microcavity Organic Light-Emitting Devices with the Change in Thickness of Organic Layer[J]. Spectroscopy and Spectral Analysis, 2012, 32(1): 69.