Journal
ORGANIC ELECTRONICS
Volume 9, Issue 6, Pages 1112-1117Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2008.07.002
Keywords
Organic light-emitting devices; Blue emission; Top-emitting; Multiple-beam interference; Wide-angle interference
Funding
- Research Foundation of Nanjing University of Posts and Telecommunications [NY207038]
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We fabricate a blue top-emitting organic light-emitting device (TEOLED) based on 4,4'-bis(2,2'-diphenylvinyl)-1,1'-biphenyl. Different from the conventional TEOLEDS that use ITO as a thickness adjustment layer to make the cavity length matchable with the resonant wavelength of the blue light, we construct the blue emission TEOLED through suppressing multiple-beam interference and utilizing wide-angle interference to enhance the blue emission. With a 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline light outcoupling layer to reduce the reflectivity of the Sm/Ag cathode, the blue emission can be obtained and its chromaticity is comparative to that from a bottom-emitting OLED. In addition, the blue emission shows stable spectra when the viewing angle alters from 0 degrees to 75 degrees. (C) 2008 Elsevier B.V. All rights reserved.
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