Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Vibrational and optoelectronic properties for intermedaite band materials based on substituted chalcopyrites
Year:2007
Research Areas
  • Physic chemistry,
  • Electronic circuits,
  • Electronic devices
Information
Abstract
Novel materials for high efficiency photovoltaic solar cell have been study. Their vibrational and optical properties are the main objective of this work. The materials of interest are based on a chalcopyrite-type semiconductor (CuGaS2) with some Ga atoms substituted by a transition metal atom. The insertion of the metal gives rise to the formation of an isolated band between the valence band and the conduction band of the host semiconductor. Here we present a frozen phonon ab-initio density functional theory calculations of the vibrational properties of the host chalcopyrite and the substituted alloys. This study can be used to calculate the phonon contribution to the free energy balance of formation and assess their thermodynamic viability. We have also carried out a study of the optoelectronic properties of these materials such as optical reflectivity and absorption coefficient. We demonstrate that the intermediate band increases the absorption of the material in the main region of the solar spectrum, as desired for photovoltaic applications
International
Si
Congress
22th European Photovoltaic Solar Energy Conference Exhibition
960
Place
Milán, Italia
Reviewers
Si
ISBN/ISSN
3-936338-22-1
Start Date
03/09/2007
End Date
07/09/2007
From page
To page
Participants
  • Participante: Irene Aguilera (UPM-ETSIT-GCC)
  • Autor: Perla Wahnon Benarroch (UPM)
  • Autor: Kefrén Sánchez Noriega (UPM)
  • Autor: Pablo Palacios Clemente (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: Tecnologías Especiales Aplicadas a la Telecomunicación
  • Departamento: Electrónica Física
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