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Analysis of the role of mobility-lifetime products in the performance of amorphous silicon p-i-n solar cells
Asensi López, José Miguel; Merten, Jens; Voz Sánchez, Cristóbal; Andreu i Batallé, Jordi
Universitat de Barcelona
An analytical model of an amorphous silicon p-i-n solar cell is presented to describe its photovoltaic behavior under short-circuit conditions. It has been developed from the analysis of numerical simulation results. These results reproduce the experimental illumination dependence of short-circuit resistance, which is the reciprocal slope of the I(V) curve at the short-circuit point. The recombination rate profiles show that recombination in the regions of charged defects near the p-i and i-n interfaces should not be overlooked. Based on the interpretation of the numerical solutions, we deduce analytical expressions for the recombination current and short-circuit resistance. These expressions are given as a function of an effective ¿¿ product, which depends on the intensity of illumination. We also study the effect of surface recombination with simple expressions that describe its influence on current loss and short-circuit resistance.
Cèl·lules solars
Cèl·lules fotovoltaiques
Camps elèctrics
Simulació per ordinador
Solar cells
Photovoltaic cells
Electric fields
Computer simulation
(c) American Institute of Physics, 1999
American Institute of Physics

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