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Proceedings Paper

Ageing effect of treated ITO substrates on the performance of organic electroluminescent devices
Author(s): Ya Dong Jiang; Zhi You Zhong; Tao Wang; Wei Zhi Li; Xing Qiao Ji
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Paper Abstract

Indium tin oxide (ITO) substrates were treated by oxygen plasma for organic light-emitting devices (OLEDs). Using the ITO substrates aged for various times as hole-injecting electrodes, the double-layered OLEDs were fabricated by vacuum evaporation process, and the ageing effect of treated ITO anodes on the performance of OLEDs was studied with respect to the electroluminescence lifetime, efficiency, luminance and driving voltage. Experimental results reveal that the luminescent and electrical characteristics of the OLEDs are strongly dependent on the properties of the ITO anodes used, and the ITO anodes aged for various times result in significant differences in device performance which become worse with the increment of the ageing time. The measurements of X-ray photoelectron spectroscopy (XPS) and contact angle show that the carbon concentration increases, the oxygen concentration decreases and water contact angle raises, and thereby the improved surface properties of ITO tend to decay, as the ageing time increases. It indicates that the change in the electroluminescent performance of the OLEDs is closely related to the changes in the chemical compositions and wettability of the ITO anodes.

Paper Details

Date Published: 26 January 2006
PDF: 8 pages
Proc. SPIE 6030, ICO20: Display Devices and Systems, 60300G (26 January 2006); doi: 10.1117/12.667372
Show Author Affiliations
Ya Dong Jiang, Univ. of Electronic Science and Technology of China (China)
Zhi You Zhong, Univ. of Electronic Science and Technology of China (China)
Tao Wang, Univ. of Electronic Science and Technology of China (China)
Wei Zhi Li, Univ. of Electronic Science and Technology of China (China)
Xing Qiao Ji, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 6030:
ICO20: Display Devices and Systems
Tatsuo Uchida; Xu Liu; Hang Song, Editor(s)

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