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Transparent P-conducting materials for application in highly efficient thin film solar cells

: Polenzky, C.; Ulrich, S.; Szyszka, B.; Bywalez, R.; Götzendorfer, S.; Löbmann, P.

Sinke, W. ; WIP - Renewable Energies, München; European Commission; UNESCO; World Council for Renewable Energy; International Photovoltaic Equipment Association:
24th European Photovoltaic Solar Energy Conference 2009. CD-ROM : The compiled State-of-the-Art of PV Solar Technology and Deployment. Proceedings of the International Conference held in Hamburg, 21-25 September 2009
München, 2009
ISBN: 3-936338-25-6
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <24, 2009, Hamburg>
Fraunhofer IST ()

We concentrate our attention on the research for p-conducting materials with high bandgap for improved integration in p-i-n solar cells. We show alternative techniques for synthesis of p-conducting materials with a wide band gap and our progress in improving these materials concerning doping and structure. We present results of the research on ptype delafossites, proved by Seebeck measurements, synthesized by sol-gel technique, in particular CuCrO2 und CuAl1-xCrxO2:Mg, and also by sputtering techniques, in particular CuAlO2 and CuCrO2. Furthermore, we could considerably lower the relative high synthesis temperature of the delafossite by systematic doping and annealing in oxygen-deficient atmosphere. Synthesis temperatures below 700 °C were reached for the first time by the sol gel route.