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Ultraviolet LED chip structure

A LED chip and ultraviolet technology, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of limiting quantum efficiency, uneven distribution, and resistance congestion of ultraviolet LED chips, and achieve the effect of improving internal quantum efficiency and achieving uniform distribution

Active Publication Date: 2020-10-13
佛山紫熙慧众科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an ultraviolet LED chip structure, aiming at solving the uneven distribution of holes in the chip plane of the existing ultraviolet LED, which leads to the resistance congestion effect formed by p-type nitride due to the higher resistance, and limits the ultraviolet LED. The problem of quantum efficiency inside the chip

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  • Ultraviolet LED chip structure

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Embodiment Construction

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplify...

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Abstract

The invention discloses an ultraviolet LED chip structure. The ultraviolet LED chip structure comprises an n-type layer, an active region multi-quantum well and a p-type layer which are sequentially arranged from bottom to top; an AlN / AlGaN hole current expansion heterostructure is arranged on the upper surface of the p-type layer. According to the technical schemes of the invention, the AlN / AlGaNhole current expansion heterostructure is formed on the upper surface of the p-type layer in an epitaxial manner; a channel formed by the heterostructure can be used for realizing rapid migration ofholes; uniform distribution of the holes in a chip plane is realized; a resistance congestion effect formed by relatively high resistance of p-type nitride is effectively avoided; holes can be uniformly injected into the active region multi-quantum well of the ultraviolet LED chip at each corner of the chip; and the internal quantum efficiency of the ultraviolet LED chip is finally improved, and the efficiency improvement and application of the nitride-based ultraviolet LED are promoted.

Description

technical field [0001] The invention relates to the technical field of optoelectronic devices, in particular to an ultraviolet LED chip structure. Background technique [0002] Ultraviolet light emitting diodes (LEDs) have important applications in the fields of physical sterilization, lighting with high color rendering index, and high-density optical storage due to their advantages of short wavelength, high photon energy, and uniform beam. At present, a large number of researches have made important breakthroughs in technologies such as crystal quality, high A1 composition and short-wavelength structure design, and successfully prepared deep ultraviolet LED devices below 300 nanometers, achieving milliwatt-level power output, and achieving high reliability. great progress has been made. [0003] However, the non-uniform distribution of holes in the existing UV LED in the chip plane leads to the resistance congestion effect formed by the higher resistance of the p-type nitr...

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Application Information

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IPC IPC(8): H01L33/14H01L33/06H01L33/32
CPCH01L33/14H01L33/06H01L33/32
Inventor 周启航
Owner 佛山紫熙慧众科技有限公司