OLED功能层界面电荷累积对器件性能的影响  

Influence of Charge Integration on the Interface Layer of OLED

作　　者：张方辉[1] 李欣[1] 王秀峰[1] 张麦丽[1] 

机构地区：[1]陕西科技大学电信学院,陕西西安710021

出　　处：《半导体光电》2008年第4期478-481,共4页Semiconductor Optoelectronics

基　　金：陕西省专利产业化项目(2005ZZ-04);陕西省教育厅产业化项目(06JC23)

摘　　要：有机电致发光器件(OLED)的任意两相邻功能层交界面上的电荷在电场作用下会发生电荷极化和电荷累积,从而给载流子的注入带来一定的影响,电荷累积的多少和累积的种类都与这两功能层材料有直接的关系。从多层电介质交界面的全电流密度和电场应满足的基本关系出发,利用初始条件和最终状态的边界条件,探讨了有机电致发光器件的任意两相邻功能层界面电荷累积的基本规律,分析了这种界面的电荷累积对器件性能的影响。结果表明,适当调节相邻功能层界面累积的电荷,可以平衡载流子的注入,有利于提高器件的效率。The charge in the junction area of any two interface layer of organic light emitting diodes（OLEDs） will polarize and integrate, which will affect the injection of carriers. The charge polarization and the charge integration are due to the difference of their electrical properties. And it also has direct relation with the electrical property of the two layer＇s material. The cause and the eliminating measure of the charge polarization and integration have been studied by using of the boundary condition of the initial and final state. In this study, the influence of the charge integration on the interface layer of organic light emitting diodes was studied. It indicates that, the positive charge on the interface will hasten the balance injection of carriers.

关 键 词：有机电致发光器件 界面 电荷累积 电场分布 空间电荷极化 

分 类 号：TN383.1[电子电信—物理电子学]