amorphous silicon, solar cells
We describe a model for a-Si:H based pin solar cells derived primarily from valence bandtail properties. We show how hole drift-mobility measurements and measurements of the temperature-dependence of the open-circuit voltage VOC can be used to estimate the parameters, and we present VOC(T) measurements. We compared the power density under solar illumination calculated with this model with published results for as-deposited a-Si:H solar cells. The agreement is within 4% for a range of thicknesses, suggesting that the power from as-deposited cells is close to the bandtail limit.
"Bandtail Limits to Solar Conversion Efficiencies in Amorphous Silicon Solar Cells," K. Zhu, J. Yang, W. Wang, E. A. Schiff, J. Liang, and S. Guha, in Amorphous and Nanocrystalline Silicon Based Films - 2003, edited by J.R. Abelson, G. Ganguly, H. Matsumura, J. Robertson, E. A. Schiff (Materials Research Society Symposium Proceedings Vol. 762, Pittsburgh, 2003), pp. 297--302.
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