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Proceedings Paper

The effect of the CsCl buffer layer on the performances of the organic electro-luminescent devices
Author(s): Wenfa Xie; Jingying Hou; Yi Zhao; Gang Cheng; Shiyong Liu
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Paper Abstract

We studied electron injection form Al cathode into the tris(8-hydroxyquinoline)aluminum (Alq3). When a thin CsCl layer is inserted between Alq3 and Al, a substantial enhancement in electron injection is observed. The results show that the device with the cathode containing the ultrathin CsCl layer has a higher brightness and electroluminescent efficiency than the device without this layer. Further, organic light-emitting devices (OLEDs) based on tris-(8-hydroxyquinoline)aluminum using a trilayer of CsCl/LiF/Al as cathodes have been fabricated. The results show that the device with the cathode containing 0.5 nm CsCl layer and 1.0 nm LiF layer has a higher brightness and electroluminescent efficiency than that of the device with LiF/Al or CsCl/Al cathodes. The maximum EL efficiency of the CsCl/LiF/Al cathode device is 3.41 cd/A, which is higher than the 2.74 cd/A of the LiF/Al device and 2.49 cd/A of the CsCl/Al device.

Paper Details

Date Published: 12 May 2004
PDF: 5 pages
Proc. SPIE 5280, Materials, Active Devices, and Optical Amplifiers, (12 May 2004); doi: 10.1117/12.520380
Show Author Affiliations
Wenfa Xie, Jilin Univ. (China)
Jingying Hou, Jilin Univ. (China)
Yi Zhao, Jilin Univ. (China)
Gang Cheng, Jilin Univ. (China)
Shiyong Liu, Jilin Univ. (China)


Published in SPIE Proceedings Vol. 5280:
Materials, Active Devices, and Optical Amplifiers
Connie J. Chang-Hasnain; Dexiu Huang; Yoshiaki Nakano; Xiaomin Ren, Editor(s)

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