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Loss analysis of high-efficiency back-contact back-junction silicon solar cells

: Kluska, S.; Granek, F.; Hermle, M.; Glunz, S.W.

Volltext urn:nbn:de:0011-n-2096768 (206 KByte PDF)
MD5 Fingerprint: 2ca478c19f11a9ae5763e03147442b4a
Erstellt am: 6.9.2012

Volltext urn:nbn:de:0011-n-209676-10 (206 KByte PDF)
MD5 Fingerprint: 2ca478c19f11a9ae5763e03147442b4a
Erstellt am: 1.10.2014

Lincot, D. ; European Commission, Joint Research Centre -JRC-:
The compiled state-of-the-art of PV solar technology and deployment. 23rd European Photovoltaic Solar Energy Conference, EU PVSEC 2008. Proceedings. CD-ROM : Held in Valencia, Spain, 1 - 5 September 2008; Proceedings of the international conference
M√ľnchen: WIP-Renewable Energies, 2008
ISBN: 3-936338-24-8
ISBN: 978-3-936338-24-9
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <23, 2008, Valencia>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISE ()
Solarzellen - Entwicklung und Charakterisierung; Silicium-Photovoltaik; Herstellung und Analyse von hocheffizienten Solarzellen; Industrielle und neuartige Solarzellenstrukturen

This work presents a model to assess the loss mechanisms of back-contact back-junction (BC-BJ) silicon solar cells fabricated at Fraunhofer ISE. It describes the three main loss mechanisms in our BC-BJ solar cells: the series resistance, the optical losses and the recombination losses and their influence on the cell efficiency. The several calculations are based on a simplified quasi-one-dimensional analytical model for the series resistance, a ray tracing simulation for the optical losses and analytical and numerical simulations for the recombination losses. Experimental measurements of the specific losses are in a good agreement with the modeled values. The reduction of the cell efficiency due to the three processes was determined to be 3.29 % abs. due to recombination processes, 1.95 % abs. due to optical losses and 0.24 % abs. due to series resistance effects. Hence the theoretical achievable cell efficiency for the actual cell design is predicted to be 22.89 % in comparison to the best measured cell result of 21.3 %.