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Analysis of local boron dopings formed with LCP

 
: Kluska, S.; Rodofili, A.; Mayer, K.; Fleischmann, C.; Granek, F.; Glunz, S.W.

:
Fulltext urn:nbn:de:0011-n-1564355 (726 KByte PDF)
MD5 Fingerprint: 71651781d8c75f4b6d43600328761df1
Created on: 3.8.2012


European Commission:
25th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2010. Proceedings : 5th World Conference on Photovoltaic Energy Conversion, 6-10 , September 2010, Valencia, Spain
München: WIP-Renewable Energies, 2010
ISBN: 3-936338-26-4
pp.1405-1409
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <25, 2010, Valencia>
World Conference on Photovoltaic Energy Conversion <5, 2010, Valencia>
English
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Solarzellen - Entwicklung und Charakterisierung; Silicium-Photovoltaik; Dotierung und Diffusion; Industrielle und neuartige Solarzellenstrukturen; Produktionsanlagen und Prozessentwicklung

Abstract
The analysis of local boron dopings formed with an alkaline aqueous boron solution as doping medium for Laser Chemical Processing (LCP) is presented. Successful local p-type boron doping using the LCP process is demonstrated for the first time. The first experiments show the ability of the used boron solution to create a surface boron doping density of 1×1020 cm-3 and a doping depth of about 1 µm. The variation of the doping depth with the pulse energy lead to LCP boron doped lines with a sheet resistance of 25 ohm/sq. to 230 ohm/sq. Furthermore, the recombination properties of local LCP boron dots were analyzed. The first experiments of dot shaped LCP boron dopings as local back surface fields for high efficiency silicon solar cell structures showed the demand for higher pulse energies or an optimized contact design to increase the effective contacting area and to reduce series resistance losses at the contacts.

: http://publica.fraunhofer.de/documents/N-156435.html