12 May 2004 Effect of the CsCl buffer layer on the performances of the organic electro-luminescent devices
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Proceedings Volume 5280, Materials, Active Devices, and Optical Amplifiers; (2004) https://doi.org/10.1117/12.520380
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China
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.
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Wenfa Xie, Wenfa Xie, Jingying Hou, Jingying Hou, Yi Zhao, Yi Zhao, Gang Cheng, Gang Cheng, Shiyong Liu, Shiyong Liu, } "Effect of the CsCl buffer layer on the performances of the organic electro-luminescent devices", Proc. SPIE 5280, Materials, Active Devices, and Optical Amplifiers, (12 May 2004); doi: 10.1117/12.520380; https://doi.org/10.1117/12.520380
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