Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Acceptable contamination levels in solar grade silicon: From feedstock to solar cell
Year:2008
Research Areas
  • Electronic circuits,
  • Electronic devices
Information
Abstract
Ultimately, alternative ways of silicon purification for photovoltaic applications are developed and applied. There is an ongoing debate about what are the acceptable contamination levels within the purified silicon feedstock to specify the material as solar grade silicon. We present a model to determine the acceptable contamination levels of different characteristic impurities for each fabrication step of a typical industrial solar cell. The acceptable impurity concentrations within the finished solar cell are calculated for SRH recombination exclusively and under low injection conditions. It is assumed that during solar cell fabrication impurity concentrations and activities are altered by a gettering step and other typical thermal steps. During the crystallization process, impurity segregation at the solid-liquid interface is taken into account. Finally, the initial contamination levels allowed within the feedstock are deduced
International
Si
Congress
European Materials Research Society Spring Meeting. Simposium K: ADvanced Silicon Materials Research for Electronic And Photovoltaic Applications
960
Place
Strasbourg, France
Reviewers
Si
ISBN/ISSN
00-0000-0000
Start Date
26/05/2008
End Date
30/05/2008
From page
299
To page
304
Materials Science and Engineering B
Participants
  • Autor: Jean Francois Lelievre (Instituto de Energía Solar)
  • Autor: Antonio Luque Lopez (UPM)
  • Autor: Jasmin Hofstetter (Instituto de Energía Solar)
  • Autor: Carlos del Cañizo Nadal (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares
  • Departamento: Electrónica Física
  • Centro o Instituto I+D+i: Instituto de Energía Solar
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