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Local p-type back surface fields via laser chemical processing (LCP): First experiments

: Rodofili, A.; Fell, A.; Hopman, S.; Mayer, K.; Willeke, G.P.; Kray, D.; Glunz, S.W.

Fulltext urn:nbn:de:0011-n-2098371 (349 KByte PDF)
MD5 Fingerprint: 67def96b6f1c16a5af8d3fff621aeec8
Created on: 6.9.2012

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
München: 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>
Conference Paper, Electronic Publication
Fraunhofer ISE ()

Laser Chemical Processing (LCP) is a low-damage laser-assisted technique that allows for various applications within solar cell fabrication. N-type emitters have already been produced successfully with LCP and efficiencies of >20% have been achieved. This paper presents first experiments as a proof-of-concept for p-type doping with LCP. General aspects of LCP doping and the requirements for possible doping chemicals are discussed. Through the method of Sheet Resistance Imaging (SRI) it has been found that p-type doping is possible with an aluminium salt solution. Using this aluminium solution point patterns have been produced on oxidized 10 Îcm ptype FZ material and through quasi steady state photoconductance decay lifetime measurements (QSSPC) it has been shown that local back surface fields have been formed.