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Measurements of the voltage dependence of the photocurrent in hydrogenated amorphous silicon p-i-n solar cells are presented along with a simple physical model of the transport. For the conditions of weakly absorbed light, the photocurrent-voltage curve can be completely specified by the light intensity and electron and hole drift lengths. Furthermore, the carrier with the longer drift length determines the solar cell current-voltage curve.
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Richard S. Crandall (1982) studied this question.
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