Light Emitting Diodes and Fabrication Method
First Claim
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1. A light emitting diode (LED), comprising:
- a first-conductive type semiconductor layer;
a light emitting layer multiple-quantum well (MQW) structure; and
a second-conductive type semiconductor layer;
wherein the light emitting layer MQW structure comprises;
a first quantum barrier layer with nanoscale pits;
a nanoscale metal reflective layer;
a plurality of quantum dots forming a quantum well layer; and
a second quantum barrier layer.
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Abstract
A light emitting diode (LED) includes quantum dots serving as the quantum well layer in the multiple-quantum well (MQW) structure, which can greatly improve the combination efficiency of electrons and holes due to quantum confinement effect; a nanoscale metal reflective layer is formed between the quantum barrier layer with nanoscale pits to instantly reflect the light emitted downwards from the MQW to the front of epitaxial structure; in addition, the nanoscale metal reflective layer can form surface plasmon to further improve light emitting efficiency.
19 Citations
20 Claims
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1. A light emitting diode (LED), comprising:
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a first-conductive type semiconductor layer; a light emitting layer multiple-quantum well (MQW) structure; and a second-conductive type semiconductor layer; wherein the light emitting layer MQW structure comprises; a first quantum barrier layer with nanoscale pits; a nanoscale metal reflective layer; a plurality of quantum dots forming a quantum well layer; and a second quantum barrier layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of fabricating a light emitting diode (LED), the method comprising:
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providing a substrate; forming a first-conductive type semiconductor layer, a light emitting layer multiple quantum well (MQW) structure and a second-conductive type semiconductor layer in sequence over the substrate through epitaxial growth, wherein the light emitting layer MQW structure is formed by; forming a first quantum barrier layer over the first-conductive type semiconductor layer through epitaxial growth; forming nanoscale pits over the first quantum barrier layer through corrosion; forming a nanoscale metal reflective layer;
forming a plurality of quantum dots as a quantum well layer through epitaxial growth; andforming a second quantum barrier layer through epitaxial growth over the first quantum barrier layer, the metal reflective layer, and the quantum dots; wherein the LED comprises; the first conductive type semiconductor layer; the light emitting layer multiple-quantum well (MQW) structure; and the second conductive type semiconductor layer; wherein the light emitting layer MQW structure comprises; the first quantum barrier layer with nanoscale pits; the nanoscale metal reflective layer; the plurality of quantum dots forming a quantum well layer; and the second quantum barrier layer. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A light-emitting system comprising a plurality of light-emitting diodes (LEDs), each LED comprising:
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a first-conductive type semiconductor layer; a light emitting layer multiple-quantum well (MQW) structure; and a second-conductive type semiconductor layer; wherein the light emitting layer MQW structure comprises; a first quantum barrier layer with nanoscale pits; a nanoscale metal reflective layer; a plurality of quantum dots forming a quantum well layer; and a second quantum barrier layer. - View Dependent Claims (20)
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Specification