Organic electroluminescent element
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United States of America Patent
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Issued Date -
Aug 24, 2006
app pub date -
May 25, 2004
filing date -
May 29, 2003
priority date (Note) -
Abandoned
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Abstract
This invention relates to an organic electroluminescent element comprising a substrate, an anode, an organic layer and a cathode placed in layer one upon another; at least one layer in the organic layer is a luminescent layer comprising a host agent and a doping agent and an azole compound having an oxadiazole structure and a triazole structure in its molecule is used in at least one layer in the organic layer. This azole compound is used as a host agent in the luminescent layer and it can also be used in a hole blocking layer or electron transporting layer. This organic EL element is suitable for use in full-color and multicolor panels and shows a higher luminous efficiency and better driving stability than EL elements utilizing the luminescence from the singlet state.
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