Orientation-controlled organic electroluminescence ofp-sexiphenyl films
作者:
H. Yanagi,
S. Okamoto,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 18
页码: 2563-2565
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.119331
出版商: AIP
数据来源: AIP
摘要:
A multilayered electroluminescent device was constructed with epitaxially oriented films ofp-sexiphenyl with its molecular axis lying or standing next to the substrate surface. The films with the lying and standing orientations were prepared by vapor deposition onto the KCl (001) surface kept at 20 and 150 °C, respectively. After successive depositions of electron-transport layer and Al cathode, the films were removed from the KCl substrate and transferred on an indium tin oxide coated glass anode. The cell with lying molecules emitted a higher electroluminescence with a narrowed spectrum at remarkably low driving voltages, as compared to one with standing molecules. This electroluminescent behaviors depend upon anisotropic distribution of the polarized emission light as well as efficiency of the carrier transport in the ordered molecular arrays with different orientation modes. ©1997 American Institute of Physics.
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