Dresden 2009 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 48: Poster 2
HL 48.83: Poster
Donnerstag, 26. März 2009, 15:00–17:30, P2
Influence of damp-heat exposure on the electronic properties of Cu(In,Ga)(S,Se)2 thin film solar cells — •Robin Knecht, Martin Knipper, Ingo Riedel, and Jürgen Parisi — Energy and Semiconductor Research Laboratory, Department of Physics, University of Oldenburg, 26111 Oldenburg, Germany
Thin film solar cells made of the chalcopyrite compound semiconductor Cu(In,Ga)(S,Se)2 (CIGSSe) exhibit strong potential for achieving high efficiency at relatively low production costs. Volume production of CIGSSe-modules started in different companies because of their favorable attributes, e.g. low cost and good efficiency.
Environmental stability of the entire solar cell structure is a major issue for the competetiveness of chalcopyrite thin film photovoltaics. In particular long-term stress by heat and humidity could play an important role for the device degradation. We carried out climate stress tests on CIGSSe-solar cells and characterized the samples in situ via current-voltage (dark/illuminated) as well as capacitance-voltage measurements. These measurements were supported by defect spectroscopic techniques in order to investigate the interplay of damp-heat exposure on the extrinsic changes of the electronic properties.