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US 8,076,684 B2Granted
Group III intride semiconductor light emitting element
AssigneeToyoda Gosei Co., Ltd.
InventorTetsuya Taki
Life of this patent
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Abstract
A group III nitride semiconductor light emitting element, comprising having a light emitting layer with a multiquantum well structure formed of a group III nitride semiconductor. The light emitting layer has plural well layers, and the plural well layers are formed to coincide in emission wavelength with each other.
Claims2
A group III nitride semiconductor light emitting element for emitting blue, green or violet light, comprising;
- a light emitting layer comprising a multiquantum well structure comprising a group III nitride semiconductor,
- wherein the light emitting layer comprises a plurality of well layers,
- wherein the plurality of well lavers are formed different from each other in composition ratio of InGaN or bandgap width such that each of the plurality of well layers comprise substantially a same emission wavelength,
- wherein the plurality of well layers comprises InGaN, and the plurality of well layers are different from each other in thickness, and
- wherein the light emitting element further comprises an n-semiconductor layer and a p-semiconductor layer, and the thickness decreases in a direction from the n-semiconductor layer to the p-semiconductor layer.
2 more elements
A group III nitride semiconductor light emitting element for emitting blue, green or violet light, comprising:
- a light emitting layer comprising a multiquantum well structure comprising a group III nitride semiconductor,
- wherein the light emitting layer comprises a plurality of well lavers,
- wherein the plurality of well layers are formed different from each other in composition ratio of InGaN or bandgap width such that each of the plurality of well layers comprise substantially a same emission wavelength,
- wherein the light emitting layer comprises a plurality of pair layers, each of the pair layers comprising a well layer and a barrier layer, the light emitting element further comprises a p-semiconductor layer, and a distance between the barrier layer and the p-semiconductor layer is less than a distance between the well layer and the p-semiconductor layer, and
- wherein the plurality of well layers decrease in thickness from a well layer of the plurality of well layers furthest from the p-semiconductor layer to a well layer of the plurality of well layers closest to the p-semiconductor layer.
2 more elements
Dependencies are inferred from the claim text.