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- Title
Novel CsCO:AgO electron injection layer for high-efficiency organic light-emitting devices.
- Authors
Zhang, Gang; Gao, Hongyan; Zhao, Lina; Gao, Yonghui; Kang, Zhijie; Tian, Xiaocui; Wang, Jin; Dong, Weili; Zhang, Xiyan; Jiang, Wenlong
- Abstract
Highly efficient organic light-emitting devices containing a novel composite electron injection layer (CsCO:AgO) were fabricated for this study. Compared with the maximum current efficiency and luminance of the control device with a 1 nm CsCO structure, a maximum current efficiency of 6.45 cd/A and a maximum luminance of 23,320 cd/m were obtained, at a AgO mass fraction of 20 % and a CsCO:AgO layer thickness of 2 nm, which is an increase by a factor of 1.80 and 2.36, respectively. The reason for the high performance can be attributed to the effective reduction of the electron injection barrier at the cathode/organic layer interface by the CsCO:AgO electron injection layer, facilitating electron injection. In addition, it is found that the electrical conductivity was increased as well by a factor of 2.54 (1.6 s/m for the CsCO:AgO (20 %) layer and 0.63 s/m for the 1 nm CsCO layer), indicating that the good device performance partly originated from the high electrical conductivity.
- Subjects
ORGANIC light emitting diodes; ELECTRONS; ELECTRIC conductivity; LUMINANCE (Photometry); NANOSTRUCTURED materials
- Publication
Journal of Materials Science: Materials in Electronics, 2015, Vol 26, Issue 9, p6506
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-015-3245-3