Organic electroluminescent element
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United States of America Patent
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Apr 4, 2017
Grant Date -
Jul 30, 2015
app pub date -
Jul 11, 2013
filing date -
Jul 19, 2012
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Abstract
Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple construction. The organic electroluminescent device includes, between an anode and cathode laminated on a substrate, a plurality of organic layers. At least one layer of the organic layers contains a carbazole compound represented by the following general formula (1) having two to three structures in each of which a carbazole ring and a dibenzofuran or dibenzothiophene ring are bonded to each other at 1- and 4-positions. In the formula (1), A represents an n-valent aromatic hydrocarbon group or aromatic heterocyclic group, n represents an integer of 2 or 3, and X represents oxygen or sulfur.
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