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Structuring technology and simulation of high efficiency back-contact back-junction silicon solar cells under low concentration

: Woehl, R.; Rüdiger, M.; Erath, D.; Stüwe, D.; Preu, R.; Biro, D.

Fulltext urn:nbn:de:0011-n-1594781 (316 KByte PDF)
MD5 Fingerprint: fabfe90ed5369a39d8c6d9578bf2f025
Created on: 11.8.2012

Bett, A.W. ; American Institute of Physics -AIP-, New York:
6th International Conference on Concentrating Photovoltaic Systems, CPV 2010 : Freiburg, Germany, 7 - 9 April 2010
Melville/NY: AIP, 2010 (AIP Conference Proceedings 1277)
ISBN: 978-0-7354-0827-2
ISSN: 0094-243X
International Conference on Concentrating Photovoltaic Systems (CPV) <6, 2010, Freiburg/Brsg.>
Conference Paper, Electronic Publication
Fraunhofer ISE ()

Industrially feasible structuring techniques as screen-printing and inkjet are investigated with regard to the minimal feature size that can be reached on back-contact back-junction silicon solar cells. The two received different pitches and all further parameters as e.g. diffusion profiles and surface recombination velocities are used as input parameters for the simulation program Sentaurus Device in order to calculate the cell parameters. The smallest pitch that can be processed only with screen-printing technology and a ratio of emitter to back surface field of at least 1.5 (2 mm) and theoretically allows efficiencies of 21% at a concentration of 5 suns. With inkjet structuring technologies structure sizes of about 10 µm and an alignment accuracy of 13.8 µm the pitch can be reduced to 500 µm which results in a possible cell performance of 23.2% under 5 suns.