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Intermediate layer and back surface field optimisations for the recrystallised wafer equivalent

: Lindekugel, S.; Rachow, T.; Janz, S.; Reber, S.

Fulltext urn:nbn:de:0011-n-2365484 (335 KByte PDF)
MD5 Fingerprint: ba39ba50e5cc30d8a00e431bdfce944f
Created on: 24.4.2013

Nowak, S. ; European Commission:
27th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2012. DVD-ROM : Proceedings of the international conference held in Frankfurt, Germany, 24 - 28 September 2012
München: WIP-Renewable Energies, 2012
ISBN: 3-936338-28-0
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <27, 2012, Frankfurt>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Materialien - Solarzellen und Technologie; Silicium-Photovoltaik; Silicium-Photovoltaik; Kristalline Silicium-Dünnschichtsolarzellen; Kristalline Silicium- Dünnschichtsolarzellen

This paper presents the investigations on two major process steps for recrystallised wafer equivalent solar cells: First the properties of the intermediate layer with respect to its optical performance in the material and in the final device were evaluated. Second, the performance of different doping concentrations in back surface fields and the resulting effects on passivation and lateral conductivity in a laser fired access concept have been investigated. Due to these process optimisations efficiencies of 13.2 % have been obtained. So far a Jsc of 33.3 mA/cm², Voc of 614 mV and FF of 78 % have been achieved as champion values however these values were measured on different samples. This paper presents the comprehensive analysis of the shortcomings, the underlying effects and presents ways to remedy those.