A kind of nitride LED structure and preparation method thereof

A technology of LED structure and nitride, applied in electrical components, circuits, semiconductor devices, etc., can solve the problem of high production cost, and achieve the effects of increasing production cost, improving light extraction efficiency and external quantum effect, and expanding critical angle.
CN102270718AInactive Publication Date: 2011-12-07ENRAYTEK OPTOELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ENRAYTEK OPTOELECTRONICS
Publication Date
2011-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a nitride light emitting diode (LED) structure, which comprises a substrate, a low-temperature nucleation layer and an undoped nitride layer, wherein the low-temperature nucleation layer and the undoped nitride layer grow on the substrate; a three-dimensional growth layer grows on the low-temperature nucleation layer; an AlxIn(1-x)N material layer is arranged between the three-dimensional growth layer and the undoped nitride layer and provided with a rough surface; the refractive index of the AlxIn(1-x)N material layer is different from that of the undoped nitride layer; and the x is more than 0 and less than 1. The invention also provides a preparation method of the nitride LED structure. The nitride LED structure provided by the invention changes the transmissiondirection of light rays due to a scattering effect, expands the critical angle of emergent light, and improves the light extraction efficiency and the external quantum efficiency. The preparation method provided by the invention can be compatible with the ordinary LED epitaxial growth process and is completed in a reaction chamber at one time, and extra machining or processing technologies are not needed.
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Description

technical field

[0001] The invention relates to the technical field of LED preparation, in particular to a nitride LED structure and a preparation method thereof. Background technique

[0002] A light-emitting diode (LED, Light Emitting Diode) is a semiconductor solid-state light-emitting device, which uses a semiconductor PN junction as a light-emitting material, and can directly convert electricity into light. When a forward voltage is applied to both ends of the semiconductor PN junction, the minority carriers injected into the PN junction recombine with the majority carriers, releasing excess energy to cause photon emission, and the direct emission colors are red, orange, yellow, Green, blue, blue, purple light.

[0003] With the development of nitride-based high-brightness LED applications, a new generation of green and environmentally friendly solid-state lighting sources-nitride LEDs has become the focus of attention. Group III nitride semiconductor materials mainly...

Claims

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