温度对单层有机电致发光器件电流平衡因子的影响（英文）  

Influence of Working Temperature on the Current Balance Factor of Single Layer Organic Light-emitting Diodes

作　　者：路飞平[1] 刘晓斌[1] 师应龙[1] 

机构地区：[1]天水师范学院物理系,甘肃天水741001

出　　处：《光子学报》2015年第8期162-167,共6页Acta Photonica Sinica

基　　金：The National Natural Science Foundation of China(Nos.11264033,11464040);the Research Project of Graduate Teacher of Gansu Province(No.2014B-079)

摘　　要：考虑有机薄膜中的陷阱,建立单层双极性有机发光器件的电学模型,研究了在不同的载流子迁移率和注入势垒条件下,器件工作温度对器件电流平衡因子的影响.研究表明:在低温工作区,当电子注入势垒和空穴注入势垒相等时,器件的电流平衡因子最大;在高温工作区,当电子迁移率大于空穴迁移率时,若电子注入势垒大于空穴注入势垒,器件的电流平衡因子最大,而当电子迁移率小于空穴迁移率时,情况恰好相反;当电子迁移率等于空穴迁移率时,电子注入势垒和空穴注入势垒相等时器件的电流平衡因子最大.此外,器件的电流平衡因子随着器件工作温度的升高而逐渐增大.可对设计高性能有机发光器件提供一定的理论参考.The influence of the working temperature on the Current Balance Factor（CBF）value of the single layer Organic Light Emitting Diodes（OLEDs）was investigated by utilizing a numerical model of a bipolar single layer OLED with organic layer level traps.Results show that the largest CBF value can be achieved when the electron injection barrier（n）is equal to the hole injection barrier（p）in the lower working temperature region at any instance.In the higher working temperature region,the largest CBF can be achieved in the case ofn 〉p under the condition of electron mobility（μ0n）larger than hole mobility（μ0p）,whereas the result for the case ofμ0n〈μ0p,is the opposite.Whenμ0n=μ0p,the largest CBF can be achieved in the case ofn=pin the entire region of the working temperature.In addition,the CBF value of the device increases as working temperature increasing.The results obtained in this paper can present an in-depth understanding of the OLEDs working mechanism.

关 键 词：电流平衡因子 工作温度 单层有机发光器件 数值研究 工作机理 

分 类 号：TN383[电子电信—物理电子学]