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

Xiaofei Han; Bin Zhou; Meng Tao

doi:10.1109/PVSC.2013.6744200

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

Xiaofei Han, Bin Zhou, Meng Tao

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	39th IEEE Photovoltaic Specialists Conference, PVSC 2013
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	506-510
Number of pages	5
ISBN (Print)	9781479932993
DOIs	https://doi.org/10.1109/PVSC.2013.6744200
State	Published - Jan 1 2013
Event	39th IEEE Photovoltaic Specialists Conference, PVSC 2013 - Tampa, FL, United States Duration: Jun 16 2013 → Jun 21 2013

Publication series

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

Other

Other	39th IEEE Photovoltaic Specialists Conference, PVSC 2013
Country	United States
City	Tampa, FL
Period	6/16/13 → 6/21/13

Keywords

Electrorefining
Impurity
Photovoltaic
Silicon

ASJC Scopus subject areas

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

Access to Document

10.1109/PVSC.2013.6744200

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Cite this

Han, X., Zhou, B., & Tao, M. (2013). Low-cost ultrapure (>99.9999%) solar-grade Si by electrorefining. In 39th IEEE Photovoltaic Specialists Conference, PVSC 2013 (pp. 506-510). [6744200] (Conference Record of the IEEE Photovoltaic Specialists Conference). 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.

39th IEEE Photovoltaic Specialists Conference, PVSC 2013. Institute of Electrical and Electronics Engineers Inc., 2013. p. 506-510 6744200 (Conference Record of the IEEE Photovoltaic Specialists Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Han, X, Zhou, B & Tao, M 2013, Low-cost ultrapure (>99.9999%) solar-grade Si by electrorefining. in 39th IEEE Photovoltaic Specialists Conference, PVSC 2013., 6744200, Conference Record of the IEEE Photovoltaic Specialists Conference, 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

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