Wavelength-converted semiconductor light emitting device
First Claim
1. A method comprising:
- providing a structure comprising;
a ceramic body including a phosphor, the phosphor being configured to absorb light of a first peak wavelength and emit light of a second peak wavelength; and
a nucleation structure bonded to a surface of the ceramic body; and
growing on the nucleation structure a semiconductor structure comprising a light emitting region disposed between an n-type region and a p-type region, the light emitting region being configured to emit light of the first peak wavelength;
wherein prior to growing, the nucleation structure has a thickness less that one hundred microns.
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Abstract
A material such as a phosphor is optically coupled to a semiconductor structure including a light emitting region disposed between an n-type region and a p-type region, in order to efficiently extract light from the light emitting region into the phosphor. The phosphor may be phosphor grains in direct contact with a surface of the semiconductor structure, or a ceramic phosphor bonded to the semiconductor structure, or to a thin nucleation structure on which the semiconductor structure may be grown. The phosphor is preferably highly absorbent and highly efficient. When the semiconductor structure emits light into such a highly efficient, highly absorbent phosphor, the phosphor may efficiently extract light from the structure, reducing the optical losses present in prior art devices.
101 Citations
19 Claims
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1. A method comprising:
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providing a structure comprising; a ceramic body including a phosphor, the phosphor being configured to absorb light of a first peak wavelength and emit light of a second peak wavelength; and a nucleation structure bonded to a surface of the ceramic body; and growing on the nucleation structure a semiconductor structure comprising a light emitting region disposed between an n-type region and a p-type region, the light emitting region being configured to emit light of the first peak wavelength; wherein prior to growing, the nucleation structure has a thickness less that one hundred microns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method comprising:
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providing a ceramic body including a phosphor, the phosphor being configured to absorb light of a first peak wavelength and emit light of a second peak wavelength; providing a semiconductor structure formed on a growth substrate, the semiconductor structure comprising a light emitting region disposed between an n-type region and a p-type region, the light emitting region being configured to emit light of the first peak wavelength; bonding the ceramic body to a surface of the semiconductor structure; and after bonding, removing the growth substrate. - View Dependent Claims (16, 17, 18, 19)
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Specification