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White LED chip and preparation method thereof

A LED chip, white light technology, applied in the direction of semiconductor devices, electrical components, circuits, etc.

Inactive Publication Date: 2014-06-04
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although the innovation speed of LED technology has far exceeded expectations, compared with the theoretical luminous efficacy of 400lm / W, there is still huge room for development

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  • White LED chip and preparation method thereof
  • White LED chip and preparation method thereof

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] refer to figure 1 , 2 , a white light LED chip in this embodiment, including a blue light epitaxial chip, a conductive layer 16, a phosphor layer 17, a metal nanostructure layer 18, a P-type electrode 19 and an N-type electrode 13;

[0035] The blue light epitaxial chip includes a substrate layer 10, a buffer layer 11, an n-type semiconductor layer 12, a quantum well layer 14, and a p-type semiconductor layer 15 stacked in sequence;

[0036] The conductive layer 16 is evaporated on the P-type semiconductor layer 15 of the blue light epitaxial chip; the phosphor layer 17 is coated on the conductive layer 16; the metal nanostructure layer 18 is grown on the phosphor layer 17 superior.

[0037] The metal nanostruc...

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Abstract

The invention discloses a white LED chip and a preparation method thereof. The white LED chip comprises a blue epitaxial chip, a conductive layer, a phosphor layer, a metal nanostructure layer, a P-type electrode and an N-type electrode. The blue epitaxial chip comprises a substrate layer, a buffer layer, an n-type semiconductor layer, a quantum well layer and a p-type semiconductor layer which are successively stacked. The conductive layer is vapor-plated on the p-type semiconductor layer of the blue epitaxial chip, the phosphor layer coats the conductive layer, and the metal nanostructure layer grows on the phosphor layer. According to the invention, a metal nanostructure is prepared on the phosphor layer of the white LED chip, the size and shape of specific metal nanostructure are designed, and the resonance wavelength of surface plasmas is adjusted, such that the absorption resonance frequency of the metal surface plasmas matches the emission frequency of a green luminescent material, resonance is generated under the mutual effects of metal surface free electron oscillation and a phosphor luminescent material, and the LED white luminescence efficiency is enhanced through surface plasma fluorescence.

Description

technical field [0001] The invention belongs to the technical field of LEDs, in particular to a white LED chip and a preparation method thereof. Background technique [0002] Generally, incandescent lamps, fluorescent lamps, sodium lamps, mercury lamps and other lighting equipment used in traditional lighting consume a lot of energy and cause great environmental pollution after being discarded, while semiconductor lighting has great application prospects in lighting energy saving and environmental protection. Countries formulate key development goals for economic policies. With the deepening of research, major breakthroughs have been made in semiconductor lighting technology, and white LEDs have been industrialized on a large scale. Although the innovation speed of LED technology has far exceeded expectations, compared with the theoretical luminous efficacy of 400lm / W, there is still huge room for development. [0003] Further improving the luminous efficiency of LED light...

Claims

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Application Information

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IPC IPC(8): H01L33/48H01L33/50H01L33/44
CPCH01L33/50H01L33/44H01L2933/0025H01L2933/0041
Inventor 周明杰王国彪陈贵堂
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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