Acta Photonica Sinica, Volume. 44, Issue 8, 823002(2015)
Influence of Working Temperature on the Current Balance Factor of Single Layer Organic Light-emitting Diodes
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 of μ0n<μ0p,is the opposite.When μ0n=μ0p,the largest CBF can be achieved in the case of n=p in 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.
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LU Fei-ping, LIU Xiao-bin, SHI Ying-long. Influence of Working Temperature on the Current Balance Factor of Single Layer Organic Light-emitting Diodes[J]. Acta Photonica Sinica, 2015, 44(8): 823002
Received: Mar. 26, 2015
Accepted: --
Published Online: Sep. 8, 2015
The Author Email: Fei-ping LU (lufpsysu@163.com)