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New approach of both junction and back surface recombination velocities in a 3D modelling study of a polycrystalline silicon solar cell

Published online by Cambridge University Press:  04 June 2008

H. L. Diallo ,
A. Seïdou Maiga ,
A. Wereme  and
G. Sissoko
H. L. Diallo
Affiliation:
Laboratoire des Semiconducteurs et d'Énergie solaire, Département de Physique, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, BP 15 003 Dakar Fann, Senegal
A. Seïdou Maiga
Affiliation:
Laboratoire des Semiconducteurs et d'Énergie solaire, Département de Physique, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, BP 15 003 Dakar Fann, Senegal Section de Physique Appliquée, UFR de Sciences Appliquées et de Technologie, Université Gaston Berger, BP 234 Saint-Louis, Senegal
A. Wereme
Affiliation:
Centre National pour la Recherche Scientifique et Technique (CNRST), Ouagadougou, Burkina Faso
G. Sissoko*
Affiliation:
Laboratoire des Semiconducteurs et d'Énergie solaire, Département de Physique, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, BP 15 003 Dakar Fann, Senegal
*
gsissoko@yahoo.com
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Abstract

A 3D modelling is used to obtain the expression of excess minority carrier density in base region of a polycrystalline silicon solar cell. The concept of the junction recombination velocity Sf is used to quantify how excess carrier flow through the junction in actual operating conditions. The plot of the photocurrent density allowed study the influence of the grain boundary recombination velocity and grain size on both, the junction recombination velocity and on the back surface recombination velocity of an n+-p-p+ solar cell. This study pointed out the importance of the losses at the back side of solar cell. It's also show that the junction recombination velocity is more important for small grain size with large values of grain boundary recombination velocity.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 42 , Issue 3 , June 2008 , pp. 203 - 211
Copyright
© EDP Sciences, 2008

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