Light emitting material and organic light-emitting device
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United States of America Patent
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Jul 27, 2010
Grant Date -
Nov 27, 2008
app pub date -
Feb 6, 2008
filing date -
Jun 20, 2001
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Abstract
A polymer light emitting material, wherein the material has a light emitting mechanism based on transition from an excited triplet state to a ground state or transition through an excited triplet state to a ground state of an electron energy level, and the material comprises a nonionic light emitting part which constitutes a part of the polymer or is bound to the polymer. The polymer light emitting material exhibits high light emission efficiency above 5%, which is the limit of external quantum efficiency of fluorescence and can be designed so as to have a large area and hence are suitable for mass production of organic light emitting devices.
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