Journal
ADVANCED MATERIALS
Volume 26, Issue 27, Pages 4730-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201400955
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Funding
- Industrial Strategic Technology Development Program - MKE/KEIT [10035225]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10035225] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A high-efficiency blue-emitting organic light-emitting diode (OLED) approaching theoretical efficiency using an exciplex-forming co-host composed of N,N'-dicarbazolyl-3,5-benzene (mCP) and bis-4,6-(3,5-di-3-pyridylphenyl)-2-methylpyrimidine (B3PYMPM) is fabricated. Iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N, C2']picolinate (FIrpic) is used as the emitter, which turns out to have a preferred horizontal dipole orientation in the emitting layer. The OLED shows a maximum external quantum efficiency of 29.5% (a maximum current efficiency of 62.2 cd A(-1)), which is in perfect agreement with the theoretical prediction.
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