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Photocarrier radiometry for noncontact evaluation of space monocrystalline silicon solar cell under low-energy electron irradiation |
Liu Jun-Yan (刘俊岩), Song Peng (宋鹏), Wang Fei (王飞), Wang Yang (王扬) |
School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China |
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Abstract A space monocrystalline silicon (c-Si) solar cell under low-energy (< 1 MeV) electron irradiation was investigated using noncontact photocarrier radiometry (PCR). Monte Carlo simulation (MCS) was employed to characterize the effect of different energy electron irradiation on the c-Si solar cell. The carrier transport parameters (carrier lifetime, diffusion coefficient, and surface recombination velocities) were obtained by best fitting the experimental results with a theoretical one-dimensional two-layer PCR model. The results showed that the increase of the irradiation electron energy caused a large reduction of the carrier lifetime and diffusion length. Furthermore, the rear surface recombination velocity of the Si:p base of the solar cell at the irradiation electron energy of 1 MeV was dramatically enhanced due to 1 MeV electron passing through the whole cell. Short-circuit current (Isc) degradation evaluated by PCR was in good agreement with that obtained by electrical measurement.
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Received: 12 February 2015
Revised: 19 March 2015
Accepted manuscript online:
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PACS:
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78.56.Cd
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(Photocarrier radiometry)
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88.40.jj
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(Silicon solar cells)
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Corresponding Authors:
Wang Yang
E-mail: ljywlj@hit.edu.cn
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Cite this article:
Liu Jun-Yan (刘俊岩), Song Peng (宋鹏), Wang Fei (王飞), Wang Yang (王扬) Photocarrier radiometry for noncontact evaluation of space monocrystalline silicon solar cell under low-energy electron irradiation 2015 Chin. Phys. B 24 097801
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