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建立了在单层有机发光二极管中电场强度不太大 (E≤ 10 4 V cm)的情况下 ,载流子注入、传输和复合的理论模型 .通过求解非线性Painleve方程得出了电场强度随坐标变化的解析函数关系式以及电流密度随电压变化关系 ,给出了电流密度以及器件的复合效率在不同的载流子迁移率情况下随电压变化关系图像 .结果表明 ,复合效率受载流子迁移率影响较大 ,在器件中多数载流子应具有较低的迁移率 ,而少数载流子应具有较高的迁移率 ,这样有利于载流子的注入和传输 ,从而可提高发光效率 .并且得出当空穴迁移率大于电子迁移率时 ,复合区域偏向阴极 ,反之亦然
The theoretical model of charge carrier injection, transport and recombination in a single-layer organic light-emitting diode with no electric field strength (E≤10 4 V cm) was established.By solving the nonlinear Painleve equation, the electric field intensity The relationship between the analytic function of the coordinate change and the current density changes with the voltage, and the current density and the recombination efficiency of the device under different carrier mobility are given. The results show that the recombination efficiency is affected by the charge carrier Mobility has a great influence on the majority of carriers in the device should have a lower mobility, and minority carriers should have a higher mobility, which is conducive to the carrier injection and transmission, which can improve the luminous efficiency And it is concluded that when the hole mobility is greater than the electron mobility, the recombination region is biased toward the cathode and vice versa