期刊
SYNTHETIC METALS
卷 160, 期 23-24, 页码 2393-2396出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2010.09.015
关键词
Triplet emitters; Polymer light-emitting diodes
资金
- National Science Council of Taiwan [NSC 98-2120-M-009-003, NSC 98-2811-M-009-048]
The influence of the iridium complex solubility on the efficiency of multi-layer solution-processed organic light-emitting diode is demonstrated by synthesized orange triplet iridium complexes with the same core. The solubility of the iridium(III) bis(4-phenylthieno13,2-clpyridinato-N,C-2') acetylacetonate is increased and uniform dispersion of iridium complex in polymer host poly(vinylcarbazole) is achieved by tert-butyl and n-hexyl group modification. Blade coating technique is utilized to achieve tri-layer structures with a polymer hole-transporting layer poly[(9,9-dioctylfluoreny1-2,7-diyl)-co-(4,4'-(N-(4-s-butylphenyl))diphenylamine)] a host-guest emissive layer, and small-molecule hole-blocking layer 1,3,5-tris(N-phenylbenzimidazol-2-yl) benzene. The efficiency as high as 20 cd/A is achieved for orange-emitting device. (C) 2010 Elsevier B.V. All rights reserved.
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