Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
On track for Solar Grade Silicon through a Siemens process-type laboratory reactor: operating conditions and energy savings
Year:2012
Research Areas
  • Electric engineers, electronic and automatic (eil),
  • Electronic devices,
  • Materials for electric engineering and electronics,
  • Technology of devices for engineering
Information
Abstract
Polysilicon cost impacts significantly on the photovoltaics (PV) cost and on the energy payback time. Nowadays, the besetting production process is the so called Siemens process, polysilicon deposition by chemical vapor deposition (CVD) from Trichlorosilane. Polysilicon purification level for PV is to a certain extent less demanding that for microelectronics. At the Instituto de Energía Solar (IES) research on this subject is performed through a Siemens process-type laboratory reactor. Through the laboratory CVD prototype at the IES laboratories, valuable information about the phenomena involved in the polysilicon deposition process and the operating conditions is obtained. Polysilicon deposition by CVD is a complex process due to the big number of parameters involved. A study on the influence of temperature and inlet gas mixture composition on the polysilicon deposition growth rate, based on experimental experience, is shown. Moreover, CVD process accounts for the largest contribution to the energy consumption of the polysilicon production. In addition, radiation phenomenon is the major responsible for low energetic efficiency of the whole process. This work presents a model of radiation heat loss, and the theoretical calculations are confirmed experimentally through a prototype reactor at our disposal, yielding a valuable know-how for energy consumption reduction at industrial Siemens reactors.
International
Si
Congress
Silicon for the Chemical and Solar Industry XI
960
Place
Bergen-Ulvik, Noruega
Reviewers
Si
ISBN/ISSN
00-0000-000-0000
Start Date
25/06/2012
End Date
29/06/2012
From page
1
To page
12
Proc. Silicon for the Chemical and Solar Industry XI
Participants
  • Autor: Alba Ramos Cabal (UPM)
  • Autor: Carlos del Cañizo Nadal (UPM)
  • Autor: Javier Valdehita Torija (UPM)
  • Autor: Juan Carlos Zamorano Saavedra (UPM)
  • Autor: A. Rodriguez
  • Autor: Antonio Luque Lopez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares
  • Centro o Instituto I+D+i: Instituto de Energía Solar
  • Departamento: Electrónica Física
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