ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC EL LIGHTING AND ORGANIC EL DISPLAY
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United States of America Patent
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app pub date -
Apr 2, 2015
filing date -
Oct 2, 2012
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Abandoned
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Abstract
The object of the invention is to provide an organic electroluminescent element comprising a hole blocking layer capable of achieving a lower driving voltage. The invention relates to an organic electroluminescent element comprising: an anode, a cathode, a first luminescent layer formed by a wet film forming method, and a second luminescent layer formed by a vacuum evaporation method, wherein the first luminescent layer contains a phosphorescent material of a low-molecular-weight compound and a first charge transporting material, and the second luminescent layer contains a fluorescent material of a low-molecular-weight compound and a second charge transporting material, and the hole blocking layer, which is adjacent to the cathode side of the second luminescent layer, contains a specific compound.
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