Journal
ADVANCED MATERIALS
Volume 22, Issue 47, Pages 5370-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201002732
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Funding
- National Natural Science Foundation of China [90922020, 50773057, 20621401]
- National Basic Research Program of China [2009CB623602, 2009CB930603]
- Fundamental Research Funds for the Central Universities of China
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A molecular design strategy for a bipolar host material is demonstrated by incorporating both electron donor and electron acceptor into a silicon-bridged structure. A two-color, all phosphor and single-emitting-layer white OLED hosted by the new bipolar compound p-BISiTPA is fabricated. The device displays a high efficiency, with eta(c, max) of 51.8 cd A(-1) eta(p, max) of 42.7 lm W-1 and eta(ext, max) of 19.1%. Furthermore, the eta(ext) is still as high as 17.4% at the luminance of 1000 cd m(-2), with a rather low roll-off value of 8.9%.
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