The measurement of impurities in silicon for solar cell production

The power conversion efficiency of solar cells is largely dependent on impurity levels in silicon. In the current investigations two sample preparation methods of silicon had been used before analysis - acid dissolution at atmospheric pressure and pressured microwave assisted technique. Quantificati...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2012-01, Vol.38 (1), p.12063-4
Main Authors: Kolosovska, G, Viksna, A, Chikvaidze, G, Osite, A, Opalais, A
Format: Article
Language:English
Subjects:
Acid dissolution
Atomic properties
Dissolution
Energy conversion efficiency
Hydrofluoric acid
Impurities
Inductively coupled plasma mass spectrometry
Mass spectrometry
Materials science
Microwaves
Photovoltaic cells
Scientific imaging
Silicon
Solar cells
Spectroscopy
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Summary:The power conversion efficiency of solar cells is largely dependent on impurity levels in silicon. In the current investigations two sample preparation methods of silicon had been used before analysis - acid dissolution at atmospheric pressure and pressured microwave assisted technique. Quantification of impurities in solar silicon was done by inductively coupled plasma mass spectrometry and electrothermal atomic spectrometry. Microwave assisted dissolution of solar silicon was more effective compared to the traditional dissolution method on the hot plate, but complete dissolution of impurities and silicon matrix was achieved with a nitric and hydrofluoric acid mixture. The mass of solar silicon for the microwave dissolution is about 0.5 g and optimal ratio of HF and HNO3 acids mixture is 3 to 5.
ISSN:1757-899X
1757-8981
1757-899X
DOI:10.1088/1757-899X/38/1/012063