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Competitive gettering of iron in silicon photovoltaics : oxide precipitates versus phosphorus diffusion
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Murphy, John D., McGuire, R. E., Bothe, K., Voronkov, V. V. and Falster, R. J. (2014) Competitive gettering of iron in silicon photovoltaics : oxide precipitates versus phosphorus diffusion. Journal of Applied Physics, Volume 116 (Number 5). Article number 053514. doi:10.1063/1.4892015 ISSN 0021-8979.
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Official URL: http://dx.doi.org/10.1063/1.4892015
Abstract
Experiments have been conducted to understand the behaviour of iron in silicon containing oxide precipitates and associated defects (dislocations and stacking faults), which is subjected to phosphorus diffusion gettering. Injection-dependent minority carrier lifetime measurements are analysed to provide quantitative information on the degree to which the precipitates and associated defects are decorated with iron impurities. These data are correlated with bulk iron measurements based on the photodissociation of FeB pairs. Iron in the vicinity of oxide precipitates in samples with relatively low levels of bulk iron contamination (< 5 × 1012 cm−3) can be gettered to some extent. Higher levels of bulk iron contamination (> 1.2 × 1013 cm−3) result in irreversible behaviour, suggesting iron precipitation in the vicinity of oxide precipitates. Bulk iron is preferentially gettered to the phosphorus diffused layer opposed to the oxide precipitates and associated defects.
Item Type: | Journal Article | ||||||||||
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Subjects: | Q Science > QC Physics | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||
Library of Congress Subject Headings (LCSH): | Iron, Silicon, Photovoltaic cells -- Design and construction, Crystals -- Defects | ||||||||||
Journal or Publication Title: | Journal of Applied Physics | ||||||||||
Publisher: | American Institute of Physics | ||||||||||
ISSN: | 0021-8979 | ||||||||||
Official Date: | 7 August 2014 | ||||||||||
Dates: |
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Volume: | Volume 116 | ||||||||||
Number: | Number 5 | ||||||||||
Number of Pages: | 7 | ||||||||||
Article Number: | Article number 053514 | ||||||||||
DOI: | 10.1063/1.4892015 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||
Date of first compliant deposit: | 27 December 2015 | ||||||||||
Date of first compliant Open Access: | 27 December 2015 | ||||||||||
Funder: | Royal Academy of Engineering (Great Britain), Engineering and Physical Sciences Research Council (EPSRC), Royal Society (Great Britain) | ||||||||||
Grant number: | EP/J01768X/2 (EPSRC), RG100076 (RS) | ||||||||||
Open Access Version: |
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