A study on swift (∼100 MeV) heavy (Si8+) ion irradiated crystalline Si-solar cell
✍ Scribed by P.C. Srivastava; S.P. Pandey; K. Asokan
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 143 KB
- Volume
- 244
- Category
- Article
- ISSN
- 0168-583X
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✦ Synopsis
A study on irradiation (of $100 MeV, Si-ion) induced degradation effects of crystalline silicon solar cells has been carried out. The cell characteristics show that the cell efficiency decreases to $30% (of its pre-irradiated value) after the irradiation (of swift heavy ions of, 10 12 or 10 13 or 10 14 ions cm À2 fluences). The reduced efficiency of the irradiated solar cells is recovered back (nearly half of the pre-irradiated efficiency) after annealing at 300 °C. The IR spectroscopic studies on the irradiated and annealed solar cells show the presence of divacancy and their complexes with impurities like hydrogen, carbon and oxygen. The swift heavy ion irradiation damage in solar cells causing a heavy loss of the cell efficiency has been attributed to these electrically active complexes which shall cause the carrier removal/compensation phenomena for the observed decrease of the cell efficiency. These complexes dissociate on annealing to change their role as donors/acceptors to cause the observed recovery of the cell efficiency on annealing.