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

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...

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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

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