Journal
ADVANCED MATERIALS
Volume 18, Issue 3, Pages 339-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200501915
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White stacked electrophosphorescent organic light-emitting devices employing three metallorganic phosphors in a compound emission layer (see Figure) are demonstrated. They show an external efficiency of 51 % and power efficiency of 20.7 lm W-1 at practical illumination intensities. A transparent MoO3 film between two adjacent electrophosphorescent elements efficiently injects charge into the stacked elements.
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