Title:
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Effect of buffer layer on minority carrier lifetime and series resistance of bifacial heterojunction silicon solar cells analyzed by impedance spectroscopy
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Author:
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Garcia Belmonte, G; García Cañadas, J; Mora-Seró, I; Bisquert, J; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim; Alcubilla González, Ramón
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies |
Abstract:
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By combining information on solar cell layer structure and electrical response analyzed by impedance spectroscopy, relevant knowledge is obtained about photogenerated carriers recombination and extraction. The inclusion of a-Si:H buffer layers on the response of bifacial heterojunction silicon solar cells prepared by hot-wire chemical vapor deposition is studied. Impedance analysis indicates that the effect of the buffer layer is twofold: (a) effective minority carrier lifetime is improved by one order of magnitude, confirmed by alternative quasi-steady-state photoconductance, and (b) whole series resistance is increased. Both effects seem to compensate each other so as to get similar efficiency and fill factor. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Energies::Energia solar fotovoltaica::Cèl·lules solars -Solar cells -Solar cell -Impedance spectroscopy -Buffer layer -Chemical vapor deposition -Carrier lifetime -Cèl·lules solars |
Rights:
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Document type:
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Article - Published version Article |
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