Carbazole derivative, and light emitting element and light emitting device using the carbazole derivative
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United States of America Patent
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Apr 30, 2013
Grant Date -
Jun 23, 2011
app pub date -
Mar 1, 2011
filing date -
Oct 19, 2004
priority date (Note) -
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Abstract
It is an object of the present invention to provide a material which is excellent in a hole injecting property and a hole transporting property, and to provide a light emitting element and a light emitting device using a material which is excellent in a hole injecting property and a hole transporting property. The present invention provides a carbazole derivative represented by a general formula (I). The carbazole derivative according to the present invention is excellent in the hole injecting property. By using the carbazole derivative according to the present invention as a hole injecting material for a hole injecting layer of a light emitting element, a driving voltage can be reduced. In addition, a lower driving voltage, improvement of the luminous efficiency, a longer life time, and higher reliability can be realized by applying the material to a light emitting element or a light emitting device.
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