Regensburg 2010 – wissenschaftliches Programm

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KR: Fachverband Kristallographie

KR 7: Topical Session Photovoltaic Materials III (with MM and BV MatWerk)

KR 7.2: Vortrag

Mittwoch, 24. März 2010, 15:00–15:15, H4

Sulfosalt Gradient Layers for Photovoltaic Applications — •Herbert Dittrich, Dan Topa, Andreas Stadler, Johannes Stöllinger, Astrid Pachler, and Gerhard Aigner — Christian Doppler Labor ASEC, Universität Salzburg, Hellbrunner Str. 34, 5020 Salzburg, Österreich

Sulfosalts have demonstrated to be an important compound semiconductor family including more than 260 members. They are characterized by a complex chemistry and crystal structure. In this contribution the deposition of Sn-Sb-S gradient layers and their physical properties with respect to photovoltaic applications will be presented.

Sn-Sb-S gradient layers were deposited by magnetron sputtering from inhomogeneous targets on pure glass substrates and substrates covered with a Mo electrode layer as used in CIGS technology. Chemical analysis was carried out by electron microprobe analysis and results were combined in concentration maps over the substrate area. In correlation to the chemical composition, the structural aspects of the layers were measured by X-ray powder diffraction. The absorption coefficient, optical bandgap, resistivity, conduction type and the Seebeck coefficient of the sulfosalt layers were measured and, again, correlated to the chemical composition and the crystal structure.

Results will be discussed with respect to thin film solar cell applications.