采用真空蒸镀法制备了不同厚度的双层有机电致发光器件,器件结构为ITO/NPB/Alq3/Al.测得不同厚度的有机电致发光器件的色坐标,发现随有机层厚度值的增加,发光器件的色坐标x值增大,y值减小.为解释此现象,从光传输角度出发利用光传输矩阵理论分析了光从激发到射出器件的光耦合输出过程,建立了光输出模型并得出色坐标变化的原因是厚度变化引起相位的变化,从而影响了传输矩阵,这样透射率会随传输矩阵的改变而改变,色坐标的计算又与透射率有关,最终使色坐标发生改变.
参考文献
| [1] | Dipti Gupta;M. Katiyar;Deepak .Various approaches to white organic light emitting diodes and their recent advancements[J].Optical materials,2006(4):295-301. |
| [2] | 刘景景,庞学海,谢明贵,卢志云.有机小分子电致红色荧光材料的研究进展[J].材料导报,2009(05):109-113. |
| [3] | Yu J;Lou S;Jiang Y et al.White organic light emitting diodes show improved performance[J].SPIE Newsroom,2008,10:1309. |
| [4] | Ikai M;Ishikawa F;Aratani N;Osuka A;Kawabata S;Kajioka T;Takeuchi H;Fujikawa H;Taga Y .Enhancement of external quantum efficiency of red phosphorescent organic light-emitting devices ices with facially encumbered and bulky Pt-II porphyrin complexes[J].Advanced functional materials,2006(4):515-519. |
| [5] | Kim, DE;Kim, WS;Kim, BS;Lee, BJ;Kwon, YS .Improvement of color purity in white OLED based on Zn(HPB)(2) as blue emitting layer[J].Thin Solid Films,2008(11):3637-3640. |
| [6] | Oh, HY;Lee, C;Lee, S .Efficient blue organic light-emitting diodes using newly-developed pyrene-based electron transport materials[J].Organic electronics,2009(1):163-169. |
| [7] | 牟强,张麦丽,张方辉.Alq3厚度以及沉积速率对OLED性能的影响[J].液晶与显示,2005(06):508-511. |
| [8] | 娄双玲,于军胜,黎威志,李璐,林慧,蒋亚东.双层结构有机电致发光器件发光层厚度的优化研究[J].半导体光电,2007(02):195-197,244. |
| [9] | Mingtao Li;Wenlian Li;Lili Chen;Zhiguo Kong;Bei Chu;Bin Li;Zhizhi Hu;Zhiqiang Zhang .Tuning emission color of electroluminescence from two organic interfacial exciplexes by modulating the thickness of middle gadolinium complex layer[J].Applied physics letters,2006(9):091108-1-091108-3-0. |
| [10] | 尹树百.薄膜光学-理论与实践[M].北京:科学出版社,1987 |
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