Organic electroluminescent devices
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United States of America Patent
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Jan 11, 2000
Grant Date -
N/A
app pub date -
Jan 22, 1998
filing date -
Jan 27, 1997
priority date (Note) -
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Abstract
An organic electroluminescent (EL) device includes at least one luminescent layer having an organic compound doped with a metal capable of acting as a donor dopant, in adjacent to a cathode electrode. The EL device ensures a diminished energy barrier in an electron injection from the cathode electrode into the luminescent layer, i.e., metal-doped organic compound layer, and thus a lowered driving voltage. The lowered driving voltage can be obtained regardless of the work function of the cathode material.
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