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Influence of grid finger and busbar structure on the performance of rear-line-contacted silicon concentrator cells

: Mohr, A.; Hermle, M.; Roth, T.; Glunz, S.W.

Fulltext urn:nbn:de:0011-n-2097485 (406 KByte PDF)
MD5 Fingerprint: 979e0b7bbec388d446de2281ac4cee53
Created on: 25.10.2012

Hoffmann, W.:
Nineteenth European Photovoltaic Solar Energy Conference 2004. Vol.1 : Proceedings of the international conference held in Paris, France, 7 - 11 June 2004
München: WIP, 2004
ISBN: 3-936338-14-0
ISBN: 88-89407-02-6
European Photovoltaic Solar Energy Conference <19, 2004, Paris>
Conference Paper, Electronic Publication
Fraunhofer ISE ()

Silicon concentrator solar cells used in high concentrator systems (up to 500x) have a high potential to achieve cost reduction for solar generated electricity. Many different small-sized (4.5 mm x 4.5 mm) rear-line-contacted concentrator cells (RLCC), all integrated in one single wafer, were fabricated. These cells are designed for application in an one-axis tracking linear concentrator system with dielectric compound parabolic concentrators second stage. The best cell reaches a maximum efficiency of 24% at 63 suns and has a high performance under high concentration (23.2% at 265x). Experimental results show that the grid finger distance and especially the position of the bus bars influence strongly the performance of these cells. A two-dimensional model for these concentrator cells is presented and numerical simulations results are discussed.