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GaAs solar battery life predicting method under space radiation environment

A space radiation environment, solar cell technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of battery maximum output power drop, battery damage, etc., and achieve the effect of saving test costs and time

Active Publication Date: 2010-06-23
NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the maximum output power of the battery decreases due to the continuous damage to the battery caused by charged particles, and proposes a life prediction method for gallium arsenide solar energy batteries in a space radiation environment

Method used

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  • GaAs solar battery life predicting method under space radiation environment
  • GaAs solar battery life predicting method under space radiation environment
  • GaAs solar battery life predicting method under space radiation environment

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] 1) Calculate the non-ionization energy loss of electrons in GaAs material

[0033] Use the Geant4 software radiation transport toolbox to simulate and calculate the relationship between the non-ionization energy loss of electrons in GaAs material and the energy of incident electrons, and calculate the non-ionization energy loss NIEL according to formula (1), and the obtained NIEL relationship is as follows figure 1 shown;

[0034] 2) Experimental research on solar cell electron irradiation

[0035] The test uses triple junction InGaP 2 / GaAs / Ge solar cell without anti-reflective coating, the area is 2cm×4cm; use electron accelerator for electron irradiation test; the sample is installed in a vacuum chamber with a vacuum degree of less than 10 -3 Pa; the test temperature is room temperature, and the temperature of the sample during the test wil...

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Abstract

The invention relates to a GaAs solar battery life predicting method under space radiation environment, belonging to the space environment engineering field and spacecraft solar battery array design field; the relation of non-ionizing energy loss and incident electron energy of electrons in the solar battery material is analog-commutated by utilizing a Geant4 software radiation transportation tool box, so as to obtain the relation curve of battery damage coefficient and displacement damage dose; particle flux energy spectrum of a GEO orbit and attenuation spectrum after penetrating through a quartz glass cover sheet are analog-commutated; a life predicting model of the solar battery is built under the GEO orbit radiation environment by utilizing the solar battery damage coefficient obtained by a ground simulation test and the displacement damage dose of a space orbit, obtained by analog commutation. In the invention, by utilizing the displacement damage dose method, the effect of different space radiation environment to the attenuation of the battery performance parameter can b predicted, so as to predict the in-orbit service life of the solar battery, determine the characteristic curve and save the test expense and time.

Description

technical field [0001] The invention relates to a method for predicting the service life of a gallium arsenide solar energy battery in a space radiation environment, which belongs to the field of space environment engineering and the field of spacecraft solar battery array design. Background technique [0002] In the Earth orbit space, there are three main sources of charged particle radiation: (1) Galactic cosmic rays from outside the solar system; (2) energetic electrons and protons captured by the Earth’s magnetic field to form the Earth’s radiation belt; (3) solar particle events . [0003] Galactic cosmic rays are charged particles from outside the solar system, and their distribution throughout interstellar space is considered to be relatively stable and isotropic. [0004] The Earth's captured radiation belts are divided into outer and inner radiation belts. The inner radiation belt is mostly trapped protons, with small amounts of electrons and ions also. The outer...

Claims

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Application Information

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IPC IPC(8): G06F17/50H01L31/042
CPCY02E10/50
Inventor 高欣王云飞冯展祖杨生胜
Owner NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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