Semiconductor light emitting device with light extraction structures
First Claim
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1. A device comprising:
- a semiconductor structure comprising a III-nitride light emitting layer disposed between an n-type region and a p-type region; and
a plurality of cavities extending into the semiconductor structure, wherein the cavities are configured to reflect light incident on the interface at angles greater than 70°
relative to a normal to a major plane of the light emitting layer.
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Abstract
Structures are incorporated into a semiconductor light emitting device which may increase the extraction of light emitted at glancing incidence angles. In some embodiments, the device includes a low index material that directs light away from the metal contacts by total internal reflection. In some embodiments, the device includes extraction features such as cavities in the semiconductor structure which may extract glancing angle light directly, or direct the glancing angle light into smaller incidence angles which are more easily extracted from the device.
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Citations
11 Claims
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1. A device comprising:
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a semiconductor structure comprising a III-nitride light emitting layer disposed between an n-type region and a p-type region; and a plurality of cavities extending into the semiconductor structure, wherein the cavities are configured to reflect light incident on the interface at angles greater than 70°
relative to a normal to a major plane of the light emitting layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification