Low-cost ultrapure (>99.9999%) solar-grade Si by electrorefining

Xiaofei Han, Bin Zhou, Meng Tao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The current SiHCl3-based processes to produce ultrapure Si are one of the major bottlenecks to lower-cost wafer-Si solar cells. Molten-salt electrorefining of Si is an alternative process to ultrapure Si, with a significantly lower energy input of ∼15 kWh/kg. It is demonstrated that controlling the potential applied to the working electrode is critical in reducing impurity concentrations. A more positive potential on the working results in purer Si deposited on the counter electrode. With margin of error, the amount of Si deposited on the cathode is almost the same as the amount dissolved from the anode. A nonequilibrium factor which affects impurity concentrations is identified, i.e. contamination.

Original languageEnglish (US)
Title of host publicationConference Record of the IEEE Photovoltaic Specialists Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages506-510
Number of pages5
ISBN (Print)9781479932993
DOIs
StatePublished - 2013
Event39th IEEE Photovoltaic Specialists Conference, PVSC 2013 - Tampa, FL, United States
Duration: Jun 16 2013Jun 21 2013

Other

Other39th IEEE Photovoltaic Specialists Conference, PVSC 2013
CountryUnited States
CityTampa, FL
Period6/16/136/21/13

Fingerprint

Impurities
Electrodes
Molten materials
Costs
Solar cells
Anodes
Cathodes
Contamination
Salts

Keywords

  • Electrorefining
  • Impurity
  • Photovoltaic
  • Silicon

ASJC Scopus subject areas

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

Cite this

Han, X., Zhou, B., & Tao, M. (2013). Low-cost ultrapure (>99.9999%) solar-grade Si by electrorefining. In Conference Record of the IEEE Photovoltaic Specialists Conference (pp. 506-510). [6744200] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2013.6744200

Low-cost ultrapure (>99.9999%) solar-grade Si by electrorefining. / Han, Xiaofei; Zhou, Bin; Tao, Meng.

Conference Record of the IEEE Photovoltaic Specialists Conference. Institute of Electrical and Electronics Engineers Inc., 2013. p. 506-510 6744200.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Han, X, Zhou, B & Tao, M 2013, Low-cost ultrapure (>99.9999%) solar-grade Si by electrorefining. in Conference Record of the IEEE Photovoltaic Specialists Conference., 6744200, Institute of Electrical and Electronics Engineers Inc., pp. 506-510, 39th IEEE Photovoltaic Specialists Conference, PVSC 2013, Tampa, FL, United States, 6/16/13. https://doi.org/10.1109/PVSC.2013.6744200
Han X, Zhou B, Tao M. Low-cost ultrapure (>99.9999%) solar-grade Si by electrorefining. In Conference Record of the IEEE Photovoltaic Specialists Conference. Institute of Electrical and Electronics Engineers Inc. 2013. p. 506-510. 6744200 https://doi.org/10.1109/PVSC.2013.6744200
Han, Xiaofei ; Zhou, Bin ; Tao, Meng. / Low-cost ultrapure (>99.9999%) solar-grade Si by electrorefining. Conference Record of the IEEE Photovoltaic Specialists Conference. Institute of Electrical and Electronics Engineers Inc., 2013. pp. 506-510
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