Light-emitting device
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United States of America Patent
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Nov 11, 2014
Grant Date -
Feb 14, 2008
app pub date -
May 16, 2005
filing date -
May 24, 2004
priority date (Note) -
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Abstract
A light emitting device comprising: an anode; a cathode; a light emissive layer located between the anode and the cathode, said light emissive layer comprising a charged metal complex for emitting light and a counterion or counterions with sufficient charge to balance the change on the charged metal complex; characterized in that the counterion or counterions are substantially immobile so (that light output from the device is immediate, provided that the combined charged metal complex and counterion do not have General Formula: (I) or (II); where C—N is a cyclometallated liquid.
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