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23 May 2011

Volume 98, Issue 21, Articles (21xxxx)

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Appl. Phys. Lett. 98, 212504 (2011); http://dx.doi.org/10.1063/1.3593371 (3 pages)

K. Okumura, T. Ishikura, M. Soda, T. Asaka, H. Nakamura, Y. Wakabayashi, and T. Kimura
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Pt(II) complex based phosphorescent organic light emitting diodes with external quantum efficiencies above 20%

Z. B. Wang, M. G. Helander, Z. M. Hudson, J. Qiu, S. Wang, and Z. H. Lu

Appl. Phys. Lett. 98, 213301 (2011); http://dx.doi.org/10.1063/1.3593495 (3 pages) | Cited 8 times

Online Publication Date: 24 May 2011

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Phosphorescent organic light emitting diodes with >20% external quantum efficiency have been demonstrated for the first time using a cyclometalated Pt(II) complex with a triarylboron group, i.e., acetylacetonato(5-dimesitylboryl-2-(phenyl)pyridyl)platinum(II), or Pt-BppyA. This unprecedented device performance is mainly attributed to the high quantum yield of the Pt(II) complex that is achieved by using a triarylboron moiety as well as to the highly optimized double emission zone device architecture.
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85.60.Jb Light-emitting devices
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