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Performance of thin film solar cells under realistic reporting conditions including degradation effects

: Kleiss, G.; Bücher, K.; Raicu, A.; Heidler, K.

Guimaraes, L.; Palz, W.; Reyff, C. de; Kiess, H.; Helm, P.:
Eleventh E.C. Photovoltaic Solar Energy Conference '92. Proceedings : International conference, held at Montreux, Switzerland, 12 - 16 October 1992
Chur: Harwood Academic Publishers, 1993 (EUR 14811/EN)
ISBN: 3-7186-5380-X
Photovoltaic Solar Energy Conference <11, 1992, Montreux>
Conference Paper
Fraunhofer ISE ()
a-Si-H; Alterung; Bewertung; CIS; degradation; Dünnschichtsolarzelle; efficiency; Energieertrag; energy rating; photovoltaics; Photovoltaik; thin films; Wirkungsgrad

Test cells made of two thin film materials are investigated under realistic reporting conditions: a- Si-H and CuInSe2. Basically a-Si-H cells exhibit strong spectral effects and small temperature effects when operated outdoors. In contrast CuInSe2 devices have a strongly temperature dependent performance and a negligible spectral effect. Therefore the sitespecific performance of these two different thin film cells is vastly different. For the degradation modelling of a-Si:H cells, a model proposed in (1) is investigated. By comparison with several other degradation experiments, a certain generalisation of the model is possible. When this model is applied to realistic reporting conditions an equilibrium state between degradation and arinealing processes defines an end-of-life state. A Site-dependent degradation study reveals that the annual average temperature of the location fundamentally influences the overall reduction in the solar cell performance. A method for simultaneous simulati on of RRC effects and degradation is developed.