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A Prague reflector structure for LED

A Bragg reflection, light-emitting diode technology, applied in lasers, semiconductor devices, phonon exciters, etc., can solve problems such as poor control of reflection spectrum type, and achieve the effect of improving luminous efficiency

Inactive Publication Date: 2008-02-27
XIAMEN SANAN OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method provides poor control over reflectance spectral patterns

Method used

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  • A Prague reflector structure for LED
  • A Prague reflector structure for LED
  • A Prague reflector structure for LED

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Embodiment Construction

[0013] The invention proposes a Bragg reflector structure that can be used for light-emitting diodes, which is an emitter composed of two or more sets of Bragg reflectors, and is characterized in that a phase adjustment layer is set between the Bragg reflectors, and its optical The thickness is different from the thickness of the Bragg reflector layer on both sides; the thickness of the phase adjustment layer can be adjusted, and the period number of the Bragg reflector can be adjusted; because the present invention adds a phase adjustment layer between the stacked Bragg reflectors, the reflection The spectral shape can be effectively adjusted in time to achieve the purpose of reflection more effectively; the phase-shifted Bragg reflector has a larger spectral width and better spectral shape, and the change is gentle at the top of the spectrum, which is conducive to improving the luminous efficiency of the light-emitting diode.

[0014] Referring to Figure 2, for a radiation wa...

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Abstract

The invention discloses a Prague reflector structure able to be used in LED, namely an emitter composed of two or above sets of Prague reflectors, and its characteristic: arranging a phase adjusting layer between the Prague reflectors and the optical thickness of the phase adjusting layer is different from those of Prague reflector layers on the two sides; the thickness of the phase adjusting layer can be adjusted; because of the addition of phase adjusting layer between the superposed Prague reflectors, it can make effective adjustment on the reflection spectrum shape, more effectively achieving the reflecting purpose and beneficial to raising light-emitting efficiency of the LED.

Description

technical field [0001] The invention relates to a Bragg reflector structure that can be used for light-emitting diodes. Background technique [0002] A Bragg reflector is a periodic material structure, usually consisting of two periodic unit materials with different refractive indices and an optical thickness equal to a quarter of the wavelength of light. Bragg reflectors are widely used in the design of optoelectronic devices to reflect part of the incident light back to the incident area. For light rays at low incident angles, the Bragg reflector has a limited reflection spectrum width and cannot reflect light rays at all incident angles simultaneously. In order to improve the Bragg reflection efficiency and reflection angle, it is necessary to increase the reflection spectrum width. The existing method adopts stacking Bragg reflectors with different reflection center wavelengths, or periodically changing Bragg reflectors to increase the width of the reflection spectrum....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/00H01S5/00
Inventor 何晓光王笃祥
Owner XIAMEN SANAN OPTOELECTRONICS TECH CO LTD
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