R. Geyer

Publications (2)0 Total impact

• Conference Proceeding: Role of the glass/TCO substrate in thin film silicon solar cells

  J. Muller, G. Schope, B. Rech, H. Schade, P. Lechner, R. Geyer, H. Stiebig, W. Reetz
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  ABSTRACT: This paper addresses the influence of the glass/TCO-substrates on the performance of p-i-n thin film silicon solar cells. We investigate various commercially available glass/SnO/sub 2/-substrates as well as magnetron-sputtered and chemically textured ZnO prepared in-house. In detail, we study differences in type and thickness of the glass substrate, the influence of material and light scattering properties of the TCO as well as measurement aspects when assessing and separating the individual effects.
  Photovoltaic Energy Conversion, 2003. Proceedings of 3rd World Conference on; 06/2003
• Conference Proceeding: Thin film solar modules based on amorphous and microcrystalline silicon

  T. Repmann, B. Sehrbrock, C. Zahren, H. Siekmann, J. Muller, B. Rech, W. Psyk, R. Geyer, P. Lechner
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  ABSTRACT: We succeeded in preparing a-Si:H//spl mu/c-Si:H solar cells on 30/spl times/30 cm/sup 2/ substrate size using high rate 13.56 MHz PECVD processes. Stable cell efficiencies up to 11.2% were achieved on textured ZnO as front TCO. First solar modules were realised by applying an industrially established technology for patterning and back contact preparation. These modules showed initial aperture area efficiencies (689 cm/sup 2/) up to 9.7% using SnO/sub 2/ coated glass substrates. In parallel, a new process technology for the development of a-Si:H//spl mu/c-Si:H solar modules on glass started operation at the Institute of Photovoltaics. On 30/spl times/30 cm/sup 2/ substrate size initial aperture area module efficiencies of 10.1% were demonstrated by using texture-etched ZnO:Al coated glass substrates.
  Photovoltaic Energy Conversion, 2003. Proceedings of 3rd World Conference on; 06/2003