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A preparation method of infrared gradient attenuation filter for solar cells used in space

An attenuation filter, solar cell technology, applied in optics, circuits, electrical components, etc., can solve the problems of reducing the absorption rate of solar cells, affecting the open-circuit voltage and short-circuit current, and reducing the open-circuit voltage and efficiency of solar cells. Practicality and application prospects, improving on-orbit work efficiency, and reducing the effect of absorption coefficient

Active Publication Date: 2021-06-25
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST +1
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Problems solved by technology

[0006] However, the transmission cut-off of this infrared cut filter in the 1200nm-1600nm band will affect the output of the open circuit voltage and short circuit current of the Ge junction, which will reduce the overall open circuit voltage and efficiency of the solar cell, so the above infrared cut filter does not High-efficiency triple-junction gallium arsenide solar cells suitable for the response wavelength range of 300nm-1800nm
[0007] The filter with gradient attenuation in the infrared band can solve the above problems. While not changing the overall response band of the solar cell, the absorptivity of the solar cell in the infrared band is appropriately reduced, so that the short-circuit currents of the three PN junctions are approximately the same, thereby Reduce the absorption coefficient of solar cell modules

Method used

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  • A preparation method of infrared gradient attenuation filter for solar cells used in space
  • A preparation method of infrared gradient attenuation filter for solar cells used in space
  • A preparation method of infrared gradient attenuation filter for solar cells used in space

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[0032] The implementation of the present application will be described in detail below with reference to the accompanying drawings and examples, so as to fully understand and implement the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects.

[0033] The external quantum efficiency (EQE) of the triple-junction GaAs solar cell was tested by using the spectral response test system on the market, and the responsivity of the solar cell to light of different wavelengths was obtained, as well as the three sub-cells of GaInP junction, GaAs junction and Ge junction. The output value of the short-circuit current under AM0. Under normal circumstances, the short-circuit current of GaInP junction and GaAs junction is relatively consistent, while the short-circuit current of Ge junction is much larger. According to the relative value of Ge junction short-circuit current and the other two junction short-circuit ...

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Abstract

A preparation method of an infrared gradient attenuation filter for a space solar cell, comprising: calculating a gradient attenuation coefficient required by a Ge junction sub-cell of a triple-junction solar cell in an operating band; designing a layered shape of the infrared gradient attenuation filter structure; deposit a thin film on the surface of the glass cover slip. The beneficial effects of the present application are: on the premise of not affecting the overall output performance of the solar cell, the absorption coefficient of the solar cell can be effectively reduced, thereby reducing the on-orbit temperature of the battery and improving the on-orbit working efficiency; The actual value of the current to adjust the gradient attenuation coefficient of the infrared band has strong practicability and application prospects.

Description

technical field [0001] The application belongs to the technical field of optical thin films, and in particular relates to a preparation method of an infrared gradient attenuation filter for space solar cells. Background technique [0002] At present, artificial satellites, spaceships, space stations and other spacecraft all use solar cells to obtain energy for continuous operation. In order to protect the solar cell from the radiation and bombardment of high-energy rays and charged particles in space and prolong the service life of the solar cell, an anti-irradiation glass cover sheet is often attached to the surface of the solar cell. The glass cover sheet is doped with cerium oxide, which can effectively absorb ultraviolet rays and particles, thereby greatly reducing the influence of radiation on the efficiency of solar cells. [0003] The irradiance intensity of the solar spectrum is mainly distributed between 200nm-2500nm, and the effective working wavelength of the thr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/28H01L31/0232H01L31/04
CPCG02B5/281H01L31/0232H01L31/04Y02E10/50
Inventor 孙希鹏铁剑锐李晓东杜永超梁存宝王鑫
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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