WAVELENGTH-CONVERTED SEMICONDUCTOR LIGHT EMITTING DEVICE
First Claim
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1. A device comprising:
- a light emitting structure comprising a light emitting layer;
a first luminescent material comprising a phosphor disposed in a path of light emitted by the light emitting layer; and
a second luminescent material comprising a semiconductor disposed in a path of light emitted by the light emitting layer, wherein the semiconductor is configured to absorb light of a first wavelength and emit light of a second wavelength.
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Abstract
Embodiments of the invention include a light emitting structure comprising a light emitting layer. A first luminescent material comprising a phosphor is disposed in a path of light emitted by the light emitting layer. A second luminescent material comprising a semiconductor is also disposed in a path of light emitted by the light emitting layer. The second luminescent material is configured to absorb light emitted by the light emitting layer and emit light of a different wavelength. In some embodiments, one of the first and second luminescent materials may be bonded to the semiconductor structure.
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Citations
20 Claims
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1. A device comprising:
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a light emitting structure comprising a light emitting layer; a first luminescent material comprising a phosphor disposed in a path of light emitted by the light emitting layer; and a second luminescent material comprising a semiconductor disposed in a path of light emitted by the light emitting layer, wherein the semiconductor is configured to absorb light of a first wavelength and emit light of a second wavelength. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device comprising:
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a light emitting structure comprising a light emitting layer and a roughened or textured surface; a first luminescent material comprising a phosphor disposed in a path of light emitted by the light emitting layer; and a second luminescent material disposed in a path of light emitted by the light emitting layer. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A structure comprising:
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a ceramic phosphor; and a wavelength-converting semiconductor layer attached to the ceramic phosphor, wherein the wavelength-converting semiconductor layer absorbs photons of a first wavelength and responsively emits photons of a second wavelength.
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20. A device comprising:
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a light emitting structure comprising a light emitting layer and a roughened or textured surface; and a semiconductor layer disposed in a path of light emitted by the light emitting layer, wherein the semiconductor layer is configured to absorb light emitted by the light emitting layer and emit light of a different wavelength.
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Specification