有机双层薄膜器件界面限制传导温度特性研究

通过对器件的温度特性的研究,能够使器件在合适的温度下保持稳定的工作状态.本文以Miller-Abrahams跳跃传导理论为基础,建立了有机-有机界面限制电流传导的电荷传输的解析模型.依据此模型分析了结构为“注入电极/有机层Ⅰ/有机层Ⅱ/收集电极”的双层薄膜器件在有机界面限制电流传导状态下的电流、电场和载流子分布与工作温度的变化关系.结果表明,在给定的工作电压下,温度升高时降落在层Ⅰ的电压升高,电场增强,而降落在层Ⅱ的电压降低,电场减弱,同时器件的电流增大.

Temperature Characteristics of Bilayer Thin-Film Devices Under Organic Interface Limited Current Conduction

Temperature characteristics are important for the performance of organic thin film devices.On the basis of the hopping theory of Miller-Abrahams,an analytical model of charge transport for bilayer organic devices under the organic-organic interface limited current conduction is developed.The dependence of current,field,and carrier distribution in bilayer organic devices with the structure of "injection electrode/LayerI/LayerII/collection electrode" on temperature are numerically analyzed.We conclude that,for a given applied voltage,when temperature is raised,the voltage of LayerIwill increase,and the field will be higher.Meanwhile,the voltage of LayerIIwill decrease,the field will become weaker accordingly,and the current of the device will increase.