Organic light emitting diodes with distributed bragg reflector
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United States of America Patent
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Apr 2, 2002
Grant Date -
N/A
app pub date -
Jul 14, 1999
filing date -
Jul 14, 1999
priority date (Note) -
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Abstract
The present invention provides OLEDs having superior brightness, which can be formed on opaque substrates such as silicon, and methods for producing such OLEDs. OLEDs according to the invention comprise a reflective electrode on the substrate, an organic active layer which provides electroluminescence, an injection layer, and a transparent organic electrode. Light from the active layer which is initially directed backward is reflected by the reflective layer to increase the apparent brightness of the diode in the forward direction.
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