The effect of electrode materials on the performance of OLEDs

Z. Y. Zhong; Y. D. Jiang

doi:10.1117/12.667376

26 January 2006 The effect of electrode materials on the performance of OLEDs

Z. Y. Zhong, Y. D. Jiang

Proceedings Volume 6030, ICO20: Display Devices and Systems; 60300J (2006) https://doi.org/10.1117/12.667376
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

The organic light emitting devices (OLEDs) with the Al, Mg-Ag and LiF/Al cathodes were fabricated by the vacuum sublimation technique, and the effect of the cathode materials on the electroluminescence (EL) characteristics of OLEDs were investigated in terms of the optical and electrical properties. The experimental data and calculation results demonstrate that the electrical and luminescent performance of OLEDs is strongly dependent on the property of cathode material and the characteristics of the cathode/organic interface. The EL characteristics of device with the LiF/Al cathode is better than those of devices with the Mg-Ag and Al cathodes. The device with LiF/Al cathode exhibits highest EL luminance and efficiency, and smallest turn-on voltage and driving voltage. Such an improvement in the device performance can be attributed to the more efficient electron injection at cathode/organic interface, and the better balanced hole and electron recombination in the light-emitting layer, and the fewer accumulated charges near the organic/organic interface.

Citation Download Citation

Z. Y. Zhong and Y. D. Jiang "The effect of electrode materials on the performance of OLEDs", Proc. SPIE 6030, ICO20: Display Devices and Systems, 60300J (26 January 2006); https://doi.org/10.1117/12.667376

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