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Performance of a-Si-H Solar Cells at Higher Growth Rates

Published online by Cambridge University Press:  15 February 2011

G. Ganguly ,
G. Lin ,
L.F. Chen ,
M. He ,
G. Wood ,
D. Carlson  and
R. Arya
G. Ganguly
Affiliation:
Solarex, A Business Unit of BP/Amoco Solar, 3601 LaGrange Parkway, Toano, VA 23168
G. Lin
Affiliation:
Solarex, A Business Unit of BP/Amoco Solar, 3601 LaGrange Parkway, Toano, VA 23168
L.F. Chen
Affiliation:
Solarex, A Business Unit of BP/Amoco Solar, 3601 LaGrange Parkway, Toano, VA 23168
M. He
Affiliation:
Solarex, A Business Unit of BP/Amoco Solar, 3601 LaGrange Parkway, Toano, VA 23168
G. Wood
Affiliation:
Solarex, A Business Unit of BP/Amoco Solar, 3601 LaGrange Parkway, Toano, VA 23168
D. Carlson
Affiliation:
Solarex, A Business Unit of BP/Amoco Solar, 3601 LaGrange Parkway, Toano, VA 23168
R. Arya
Affiliation:
Solarex, A Business Unit of BP/Amoco Solar, 3601 LaGrange Parkway, Toano, VA 23168
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Abstract

We have studied the effects of external growth parameters during the deposition of the i-layers of a-Si p-i-n solar cells using dc plasma decomposition of silane-hydrogen mixtures at growth rates of up to 3A/s. The loss of initial performance with increasing growth rate is mainly due to a loss of short-circuit current. The relative degradation of efficiency upon extended light soaking also increases with growth rate, and is mainly due to a decrease in the fill factor. Systematic comparisons of the performance and its degradation with changes in growth conditions reveal that these two components of the total degradation have distinct origins.

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