Progress on the development of a technology for silicon purification

Cañizo Nadal, Carlos del and Méndez Giménez, L. and Ramos Cabal, Alba and Rodríguez Rodríguez, Araceli (2012). Progress on the development of a technology for silicon purification. In: "6th International Workshop on Crystalline Silicon Solar Cells (CSSC6)", 08/10/2012 - 11/10/2012, Aix les Bains, France. pp. 1-4.

Description

Title: Progress on the development of a technology for silicon purification
Author/s:
  • Cañizo Nadal, Carlos del
  • Méndez Giménez, L.
  • Ramos Cabal, Alba
  • Rodríguez Rodríguez, Araceli
Item Type: Presentation at Congress or Conference (Article)
Event Title: 6th International Workshop on Crystalline Silicon Solar Cells (CSSC6)
Event Dates: 08/10/2012 - 11/10/2012
Event Location: Aix les Bains, France
Title of Book: International Workshop on Crystalline Silicon Solar Cells
Date: 2012
Subjects:
Freetext Keywords: Polysilicon, Solar Silicon, Chlorosilane Route
Faculty: Instituto de Energía Solar (IES) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The polysilicon market is experiencing tremendous changes due to the strong demand from Photovoltaics (PV), which has by far surpassed the demand from Microelectronics. The need of solar silicon has induced a large increase in capacity, which has now given a scenario of oversupply, reducing the polysilicon price to levels that put a strong pressure on the cost structure of the producers. The paper reports on the R&D efforts carried out in the field of solar silicon purification via the chlorosilane route by a private-public consortium that is building a pilot plant of 50-100 tonnes/year, that will synthesize trichlorosilane, purify it and deposit ultrapure silicon in an industrial-size Siemens type reactor. It has also capabilities for ingot growth and material characterization. A couple of examples of the progress so far are given, the first one related to the recycling scheme of chlorinated compounds, and the second to the minimization of radiation losses in the CVD deposition process, which account for a relevant part of the total energy consumption. In summary, the paper gives details on the technology being developed in our pilot plant, which offers a unique platform for field-testing of innovative approaches that can lead to a cost reduction of solar silicon produced via the chlorosilane route.

More information

Item ID: 19994
DC Identifier: http://oa.upm.es/19994/
OAI Identifier: oai:oa.upm.es:19994
Deposited by: Memoria Investigacion
Deposited on: 28 Sep 2013 11:02
Last Modified: 21 Apr 2016 22:07
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