ORGANIC LIGHT-EMITTING DEVICE INCORPORATING MULTIFUNCTIONAL OSMIUM COMPLEXES
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United States of America Patent
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Issued Date -
Jan 1, 2009
app pub date -
Jun 29, 2007
filing date -
Jun 29, 2007
priority date (Note) -
Abandoned
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Abstract
Fabrication of organic light-emitting devices is disclosed by employing the efficient, multifunctional orange-red emitting osmium complex in combination with a second phosphorescent complex showing strong emission at the shorter wavelength region such as blue or blue-green emitting iridium (Ir) complex. The present invention provides WOLEDs with forward viewing efficiencies up to (17% photon/electron, 35.6 cd/A, 28 lm/W) and total peak external efficiencies up to (28.8%, 47.5 lm/W), giving the conceptual design for the highly efficient and color-stable phosphorescent WOLEDs.
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