Wavelength-Converted Semiconductor Light Emitting Device
First Claim
1. A light emitting device comprising:
- a semiconductor structure comprising a plurality of layers including a light emitting region sandwiched between and n-type region and a p-type region and;
a luminescent material in direct contact with one of the plurality of layers, wherein at a wavelength of light emitted by the light emitting region, the imaginary component k of a refractive index of the luminescent material is greater than 0.01.
3 Assignments
0 Petitions
Accused Products
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.
61 Citations
18 Claims
-
1. A light emitting device comprising:
-
a semiconductor structure comprising a plurality of layers including a light emitting region sandwiched between and n-type region and a p-type region and; a luminescent material in direct contact with one of the plurality of layers, wherein at a wavelength of light emitted by the light emitting region, the imaginary component k of a refractive index of the luminescent material is greater than 0.01. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A structure comprising:
-
a ceramic body; and a nucleation structure thinner than one hundred microns; and a bonded interface that connects the ceramic body to the nucleation structure, the bonded interface being disposed between the ceramic body and the nucleation layer;
wherein;the nucleation structure is configured such that an epitaxial structure may be grown on the nucleation structure; and any separation between the ceramic body and the nucleation structure is less than one hundred microns. - View Dependent Claims (14, 15, 16)
-
-
17. A structure comprising:
-
a package element; a ceramic body; and a semiconductor structure disposed between and connected to the ceramic body and the package element, 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; wherein the package element is separated from the ceramic body by less than one hundred microns and the package element has a lateral extent exceeding a lateral extent of the semiconductor structure. - View Dependent Claims (18)
-
Specification