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Fine-line screen printing for solar cells

 
: Reis, I.E.; Huljic, D.; Hahne, P.; Preu, R.; Zickermann, D.; Bucher, B.; Fleischer, P.V.

11th International Photovoltaic Science and Engineering Conference 1999. Technical Digest : Sept. 20 - 24, 1999, Hokkaido, Japan, Royton Sapporo
Sapporo, 1999
pp.335-336
International Photovoltaic Science and Engineering Conference (PVSEC) <11, 1999, Sapporo>
English
Conference Paper
Fraunhofer ISE ()

Abstract
Industrial screen printed silicon solar cells have been simulated in order to evaluate the potential of fine-line printing techniques. The calculation yields an increase of conversion efficiency of 0.3-0.4% absolute for a reduction of finger width from 160um down to 60um on homogeneous emitters, assuming a sufficient finger height is realised. Experiments on fine-line screen printing have been carried out by means of a new screen material and a new screen. Therefore several available silver metallisation pastes have been tested. The surface of the silicon wafer emerges to be of evident influence on the feasibility of fine-line contacts. On textured as well as acidic etched surfaces fine-line printing is possible, while difficulties occur on smooth surfaces. Fine-line screen printing in the range of 70um is realised.

: http://publica.fraunhofer.de/documents/N-209812.html