Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Formation of an intermediate band in In2S3 polycrystalline thin films Cu impurities
Year:2011
Research Areas
  • Materials for electric engineering and electronics,
  • Solar cells,
  • Technology of devices for engineering
Information
Abstract
The concept of intermediate band (IB) formed by quantum dots or impurities has been proposed as a way to surpass the limiting efficiency of solar cells. Although still under development, proof of such a concept has been demonstrated in the field of nanostructured III-V-based devices. Additionally, recent theoretical studies have suggested the potential of implementing IBs into thin-film solar cells. Binary and multinary thin-film chalcogenides appear as good candidates to evaluate the possibility of forming an IB by means of incorporating selected impurities. We have performed experiments on polycrystalline In2S3 films and studied the effects of Cu impurities introduced into the chalcogenide during the growth process. Under specific synthesis conditions, related to an adequate Cu-distribution, optical measurements have shown the appearance of a discrete absorption band around 1.5-1.6 eV, which could potentially fulfill conditions as required for IB-operation. Additionally, we report on the optimisation of the bandgap of the In2S3 host compound for optimal IB-operation through the introduction of Na atoms at cationic vacancies.
International
Si
Congress
E-MRS Spring Meeting
960
Place
Estrasburgo, Francia
Reviewers
Si
ISBN/ISSN
00-0000-000-0
Start Date
09/05/2011
End Date
13/05/2011
From page
1
To page
2
Proc. EMRS_Spring Meeting
Participants
  • Autor: E. Leonard
  • Autor: David Fuertes Marron (UPM)
  • Autor: N. Barreau
  • Autor: L. Arzel
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
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)