Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Intermediate Band PV Materials: Proposal of new systems and experimental realizations
Year:2011
Research Areas
  • Physics chemical and mathematical,
  • Solar cells
Information
Abstract
The intermediate band (IB) solar cell, based on the absorption of two low energy photons to promote one electron across the full bandgap, has been proposed to increase PV efficiency by a factor above 1.5. Using DFT calculations we show here that silicon materials with certain elements inserted and which have been experimentally prepared and reported in the literature, develop an IB electronic structure able to implement an IB solar cell. In particular, this happens for Ti atoms introduced via ion implantation and occupying interstitial sites, and for S or Se atoms inserted in lattice sites by similar methods. In addition, we present new experimental data for another IB material previously proposed and synthesized by us, viz. vanadium-substituted In2S3: using a photocatalytic method, in which photogenerated electrons and holes are transferred to molecules at the surface of this material (made in powder form and suspended in an aqueous solution) producing thus chemical reactions, we show that insertion of V in In2S3 allows to generate electrons and holes, which can be extracted at the material surface, also with photons having energy lower than the In2S3 bandgap width. This material could thus be used to build an IB thin film PV cell.
International
Si
Congress
26th European Photovoltaic Solar Energy Conference
960
Place
Hamburgo, Alemania
Reviewers
Si
ISBN/ISSN
3-936338-27-2
Start Date
05/09/2011
End Date
09/09/2011
From page
44
To page
47
Proc. 26th EU PVSEC
Participants
  • Autor: Perla Wahnon Benarroch (UPM)
  • Autor: Pablo Palacios Clemente (UPM)
  • Autor: Irene Aguilera Bonet (UPM)
  • Autor: Yohanna Seminóvski Pérez (UPM)
  • Autor: K. Sánchez Noriega
  • Autor: J.C. Conesa
  • Autor: R. Lucena
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
  • Departamento: Física y Química Aplicadas a la Técnica Aeronáutica
  • Departamento: Tecnologías Especiales Aplicadas a la Telecomunicación
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