Title: Comparison of Electrical Modeling for CI(G)s Thin-film Solar Modules Operating Under Various Outdoor Conditions
Citation: Proceedings of the 26th EU PVSEC p. 3442-3445
Publisher: WIP
Publication Year: 2012
JRC N°: JRC63444
ISBN: 3-936338-27-2
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC63444
Type: Articles in periodicals and books
Abstract: In this paper we present results of electrical modeling of CI(G)S thin-film photovoltaic (PV) modules located in two different geographical locations – Wrocław in Poland and Ispra in Italy. Electrical parameters were obtained from fitting the large amount of data (i.e. I-V curves) acquired during long-term outdoor monitoring of commercially available modules with use of a double diode equivalent electrical model. Based on an approximation process, two model parameters were chosen for further analysis: diffusion IS1 and recombination IS2 related components of dark diode saturation current. Energy band gap Eg values were calculated for both of PV modules. Determined parameters, together with equations describing the processes of diffusion/recombination in p-n junction and coming from previous investigation of material parameters, were used to model new values of IS1 and IS2. These replace values that were previously approximated with the double diode equivalent model. It allows us to predict measured I-V curves and – what is more – to determine electrical parameters for further analysis and simulations. Keywords: Cu(InGa)Se2, Thin Film, Electrical Properties
JRC Directorate:Energy, Transport and Climate

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