摘要
建立了计算有机发光二极管 (OL ED)体电势的理论模型。把在光照下所产生电流与暗电流相等时所加的电压称为补偿电压 ,得出了补偿电压与体电势函数关系式 ,该函数只与材料参数及温度有关。在温度较低时 ,补偿电压即为体电势 ;在室温情况下 ,因受扩散运动影响 ,体电势低于补偿电压。
A model for calculation the built in potential (V bi ) in organic light emitting diodes (OLED) is presented.The voltage at which the current underillumilation in OLED is equal to the dark current,namely the net photocurrent is zero,which we term the 'compensation' voltage (V 0).The relation between the V bi and V 0 is maintained.It is dependent of the temperature and material parameters.At low temperature,V 0 is equeal to V bi .However,because of diffusion of thermally injected charges at room temperature,V 0 is lower than V bi .The theory derived from this model consists with the experimental results.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2002年第3期250-252,共3页
Journal of Optoelectronics·Laser
基金
中南大学文理基金资助项目 (6980 6)
关键词
计算
有机发光二极管
体电势
光生载流子
Organic light emitting diodes (OLED)
Built in potential (V bi )
Photogenerated carriers
