III-Nitride Semiconductor Light Emitting Device
First Claim
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1. A III-nitride semiconductor light emitting device, comprising:
- an active layer for generating light by recombination of electrons and holes;
an n-type nitride semiconductor layer positioned on one side of the active layer; and
a p-type nitride semiconductor layer positioned on the other side of the active layer to be opposite to the n-type nitride semiconductor layer, and including a first nitride semiconductor layer with a first doping concentration, a second nitride semiconductor layer with a second doping concentration lower than the first doping concentration and with a rough surface, and a third nitride semiconductor layer with a higher doping concentration than a second doping concentration.
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Abstract
The present disclosure relates to a III-nitride semiconductor light emitting device which improves external quantum efficiency by using a p-type nitride semiconductor layer with a rough surface, the p-type nitride semiconductor layer including: a first nitride semiconductor layer with a first doping concentration, a second nitride semiconductor layer with a second doping concentration lower than the first doping concentration and with the rough surface, and a third nitride semiconductor layer with a higher doping concentration than a second doping concentration.
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Citations
11 Claims
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1. A III-nitride semiconductor light emitting device, comprising:
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an active layer for generating light by recombination of electrons and holes; an n-type nitride semiconductor layer positioned on one side of the active layer; and a p-type nitride semiconductor layer positioned on the other side of the active layer to be opposite to the n-type nitride semiconductor layer, and including a first nitride semiconductor layer with a first doping concentration, a second nitride semiconductor layer with a second doping concentration lower than the first doping concentration and with a rough surface, and a third nitride semiconductor layer with a higher doping concentration than a second doping concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A III-nitride semiconductor light emitting device, comprising:
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an active layer for generating light by recombination of electrons and holes; an n-side electrode for supplying the electrons to the active layer; a p-side electrode for supplying the holes to the active layer; an n-type nitride semiconductor layer electrically contacting the n-side electrode; and a p-type nitride semiconductor layer electrically contacting the p-side electrode, and including a first nitride semiconductor layer with a first doping concentration, a second nitride semiconductor layer with a lower doping concentration than the first doping concentration and with a rough surface, and a third nitride semiconductor layer positioned between the second nitride semiconductor layer and the p-side electrode to lower a contact resistance between the p-side electrode and the p-type nitride semiconductor layer.
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Specification