Journal
APPLIED PHYSICS EXPRESS
Volume 4, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1143/APEX.4.082105
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Funding
- National Natural Science Foundation of China [10934001, 60878019, 10821062]
- National Basic Research Program [2007CB307000, 2009CB930504]
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A high-color-quality white top-emitting organic electroluminescent device (TOLED) with a simple structure was fabricated using both exciton and electroplex emission. White emission was achieved by combining the exciton emission of 4,4'-bis(2,2'-diphenylvinyl)-1,1'-biphenyl (DPVBi) and the broad band emission of electroplex generated between DPVBi and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP). The white emission spectra showed excellent stability at different bias voltages. By inserting a blend film of DPVBi: BCP and adjusting the ratio of DPVBi to BCP in the blend film, the CIE coordinates of the white emission can be tuned to (0.30; 0.33) and the electroluminescence efficiency can also be enhanced. (C) 2011 The Japan Society of Applied Physics
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