Multi-color organic electroluminescence device with overlapping luminous layers
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United States of America Patent
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Sep 11, 2001
Grant Date -
N/A
app pub date -
Aug 13, 1998
filing date -
Aug 27, 1997
priority date (Note) -
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Abstract
A multi-color organic EL device capable of preventing color mixing due to leakage luminescence while incorporating therein luminous layers formed by mask deposition techniques. Anodes, a hole transport layer, luminous layers different in type from each other and cathodes are laminated. In such a laminate structure, the luminous layers different in type which are arranged adjacently to each other are constructed so as to permit the luminous layer increased in band gap to get between the luminous layer decreased in band gap and the hole transport layer.
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