Light-emitting element, exposure head and image-forming apparatus
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United States of America Patent
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Apr 23, 2013
Grant Date -
Sep 30, 2010
app pub date -
Mar 18, 2010
filing date -
Mar 26, 2009
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Abstract
A light-emitting element includes a cathode, an anode, a luminescent layer disposed between the cathode and the anode, a first electron transport layer disposed between the luminescent layer and the cathode, and a second electron transport layer in contact with the luminescent layer and the first electron transport layer between the luminescent layer and the first electron transport layer. The luminescent layer contains a red luminescent material emitting red light. The first electron transport layer contains a first electron transport material. The second electron transport layer contains a second electron transport material different from the first electron transport material.
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