Characteristics of HEM silicon produced in a reusable crucible

A reusable crucible has been developed for directional solidification of multicrystalline silicon ingots by HEM. Up to five 40 kg, 33 cm square cross section ingots have been produced without visible degradation of the crucible. Characterization of the silicon shows large grain size, vertical orient...

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Published inConference Record of the Twenty Third IEEE Photovoltaic Specialists Conference - 1993 (Cat. No.93CH3283-9) pp. 73 - 77
Main Authors Khattak, C.P., Schmid, F., Schubert, W.K., Cudzinovic, M., Sopori, B.L.
Format Conference Proceeding Journal Article
LanguageEnglish
Published IEEE 1993
Subjects
Ceramics
Costs
Crystallization
Degradation
Grain boundaries
Laboratories
Photovoltaic systems
Production
Silicon compounds
Solar power generation
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Summary:A reusable crucible has been developed for directional solidification of multicrystalline silicon ingots by HEM. Up to five 40 kg, 33 cm square cross section ingots have been produced without visible degradation of the crucible. Characterization of the silicon shows large grain size, vertical orientation of grain boundaries, uniform resistivity, low defect density, diffusion lengths up to 272 /spl mu/m and less than 1 ppma oxygen concentration. Solar cells of 2 cm/spl times/2 cm size fabricated on 10 cm square wafers have shown good uniformity and efficiencies up to 15.1% and V/sub OC/ to 616 mV.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISBN:0780312201
9780780312203
DOI:10.1109/PVSC.1993.347077