Purification of low quality silicon feedstock

R. Einhaus, D. Sarti, C. Hässler, C. Trassy, Y. Delannoy, S. De Wolf, F. Ferrazza, S. Martinuzzi, W. Warta

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations


In the frame of the European ARTIST project, purification techniques have been developed that allow to use alternative silicon feedstock sources for PV production: (i) Very low resistivity (0.08-0.1 Ωcm) (VLR-) silicon material was produced by directional solidification, resulting in solar cells of 14.5% efficiency, (ii) an inductive plasma purification unit was developed, demonstrating a significant reduction of B, P, C, O, Ca, and AI impurities from upgraded metallurgical grade silicon, (iii) an Sb evaporation/condensation process was established to allow heavily doped n-type silicon feedstock to be used for PV, resulting in an average reduction of Sb by a factor of more than 100 after evaporation and directional solidification and in solar cell efficiencies above 15.5%. This paper summarises the technical state-of-the-art that has been achieved until present with respect to the above mentioned techniques.

Original languageEnglish (US)
Title of host publicationConference Record of the 28th IEEE Photovoltaic Specialists Conference - 2000
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)0780357728
StatePublished - 2000
Externally publishedYes
Event28th IEEE Photovoltaic Specialists Conference, PVSC 2000 - Anchorage, United States
Duration: Sep 15 2000Sep 22 2000

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371


Other28th IEEE Photovoltaic Specialists Conference, PVSC 2000
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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