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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.
Considering the traps in the organic thin films, an electrical model of a single-layer bipolar organic light-emitting device is established, and the influence of device operating temperature on the device current balance factor under different carrier mobility and implantation barrier is studied. : In the low temperature working area, when the electron injection barrier and the hole injection barrier are equal, the current balance factor of the device is the largest; when the electron mobility is higher than the hole mobility in the high temperature working zone, if the electron injection barrier is larger than the null Hole injection barrier, the device current balance factor maximum, and when the electron mobility is less than the hole mobility, the situation is exactly the opposite; when the electron mobility is equal to the hole mobility, the electron injection barrier and the hole injection barrier equal The current balance factor of the device is the largest.In addition, the current balance factor of the device increases with the increase of the device operating temperature, which can provide a theoretical reference for the design of high performance organic light-emitting devices.