Light emitting diode having distributed Bragg reflector
First Claim
1. A light-emitting diode (LED), comprising:
- a light-emitting structure arranged on a first surface of a substrate, the light-emitting structure comprising;
a first conductivity-type semiconductor layer;
a second conductivity-type semiconductor layer; and
an active layer interposed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer; and
a first distributed Bragg reflector arranged on a second surface of the substrate opposite to the first surface, the first distributed Bragg reflector to reflect light emitted from the light emitting structure,wherein the first distributed Bragg reflector comprises a reflectivity of at least 90% with respect to light of a first wavelength in a blue wavelength range, light of a second wavelength in a green wavelength range, and light of a third wavelength in a red wavelength range, andwherein the first distributed Bragg reflector comprises a laminate structure comprising alternately stacked SiO2 and Nb2O5 layers.
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Accused Products
Abstract
Exemplary embodiments of the present invention provide light-emitting diodes having a distributed Bragg reflector. A light-emitting diode (LED) according to an exemplary embodiment includes a light-emitting structure arranged on a first surface of a substrate, the light-emitting structure including a first conductivity-type semiconductor layer, a second conductivity-type semiconductor layer, and an active layer interposed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer. A first distributed Bragg reflector is arranged on a second surface of the substrate opposite to the first surface, the first distributed Bragg reflector to reflect light emitted from the light-emitting structure. The first distributed Bragg reflector has a reflectivity of at least 90% with respect to light of a first wavelength in a blue wavelength range, light of a second wavelength in a green wavelength range, and light of a third wavelength in a red wavelength range. The first distributed Bragg reflector has a laminate structure having an alternately stacked SiO2 layer and Nb2O5 layer.
32 Citations
26 Claims
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1. A light-emitting diode (LED), comprising:
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a light-emitting structure arranged on a first surface of a substrate, the light-emitting structure comprising; a first conductivity-type semiconductor layer; a second conductivity-type semiconductor layer; and an active layer interposed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer; and a first distributed Bragg reflector arranged on a second surface of the substrate opposite to the first surface, the first distributed Bragg reflector to reflect light emitted from the light emitting structure, wherein the first distributed Bragg reflector comprises a reflectivity of at least 90% with respect to light of a first wavelength in a blue wavelength range, light of a second wavelength in a green wavelength range, and light of a third wavelength in a red wavelength range, and wherein the first distributed Bragg reflector comprises a laminate structure comprising alternately stacked SiO2 and Nb2O5 layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A light-emitting diode (LED), comprising:
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a light-emitting structure arranged on a first surface of a substrate, the light-emitting structure comprising; a first conductivity-type semiconductor layer; a second conductivity-type semiconductor layer; and an active layer interposed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer; an insulation layer arranged on the light emitting structure; a distributed Bragg reflector arranged on a second surface of the substrate opposite to the first surface, the distributed Bragg reflector to reflect light emitted from the light-emitting structure and comprising a reflectivity of at least 90% with respect to light of a first wavelength in a blue wavelength range, light of a second wavelength in a green wavelength range, and light of a third wavelength in a red wavelength range; and a reflective metal layer, wherein the distributed Bragg reflector is arranged between the substrate and the reflective metal layer. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A light-emitting diode (LED), comprising:
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a substrate; a light emitter arranged on a first surface of the substrate; and a first distributed Bragg reflector arranged on an opposing second surface of the substrate and configured to reflect light emitted from the light emitter, the first distributed Bragg reflector comprising SiO2 layers and Nb2O5 layers that are alternately arranged on each other; and a second distributed Bragg reflector arranged on the light emitter and configured to transmit the light emitted from the light emitter and to reflect visible external light having a longer wavelength than that of the light generated in the light emitter.
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Specification