Research On Physical Effects Of Solar Cell System Irradiated By Protons

As an important part of the spacecraft power system,solar cells require higher conversion efficiency and reliability and a longer service life.By using an anti-irradiation glass coverslip,the protection of the solar cell against particle radiation can be enhanced,the service life of the solar cell can be prolonged,and the spacecraft can obtain a reliable energy supply.With the development of technology,the solar panel glass cover sheet has gradually evolved from a single glass to an optical system composed of multiple layers of materials,mainly a glass cover sheet,an anti-reflection anti-reverse composite film structure.Borosilicate glass is an ideal solar cell cover glass material,and magnesium fluoride and indium tin oxide composite film is a better film structure.Silicon cell is the most mature and widely used solar cell,borosilicate glass is a kind of ideal glass cover material,magnesium fluoride and indium tin oxide composite film is a film structure with good performance which has been used in recent years.Through Monte Carlo method,combined with SRIM software,analys the physical mechanism of damage of particle irradiation borosilicate glass and solar cell.Based on the theory and basic formula of particle-substance interaction,the theory of NRT displacement model and the basic formula,the physical mechanism of irradiation damage is studied by analyzing the stopping power,ionization energy loss,displacement energy loss and vacancy of protons with different incident energies in the target.Then,the parameters of solar cells were calculated by PC ID,and the displacement damage t was connected with the parameters based on the minority carrier life.The physical mechanism of the changes in the battery performance caused by particle irradiation was analyzed.The results show that the method to obtain the vacanices from the output file of SRIM is convenient,but the results are different under different modes.It is necessary to select an accurate mode according to the atomic number of the incident particles and the properties of the target material.The physical analysis of the radiation damage effect of the target material can be carried out only in the correct mode.For optical system,the great change of optical properties is mainly due to the color center structure of optical crystal caused by ionization and displacement damage.For silicon cells,the defects caused by displacement damage will form the carrier composite center,which will reduce the life of minority carriers,affect the electrical performance of solar cells.Finally,the protection effect of the 100um glass system on the solar cell is verified,and the variation of the battery performance with the minority carrier lifetime is simulated,the irradiation damage process of solar cell system from micro-damage to electrical properties is summarized.