Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Enhancement of optical absorption in Ga-chalcopyrite-based intermediate-band materials for high efficiency solar cells
Year:2010
Research Areas
  • Physics chemical and mathematical
Information
Abstract
We present absorption properties enhancement for two CuGaS2-based intermediate-band materials,as promising compounds for high efficiency, lower-cost photovoltaic devices. Previous band diagrams calculations predicted that these materials present a partially filled localized band within the band gap of the host semiconductor, which would increase the absorptiono flow-energy photons, creating additional electron holepairs respect to a conventional semiconductor. This could ideally result in an increase of the photocurrent of the cell without thefall of the open-circuit voltage. In this paper we show, using density functional methods, the effect of this intermediate band on the optical properties of the derived alloys. We highlight the significant enhancement of the absorption coefficient observed in the most intense range of the solar emission and we study the reflectance and transmittance properties of the materials in order to understand the effect of the thickness of the sample on the optical properties. We compare two different substituents of the Ga atoms in CuGaS2, namely, Ti and Cr atoms, able toform the intermediate-band material, and their interest for photovoltaic applications.
International
Si
JCR
Si
Title
SOLAR ENERGY MATERIALS AND SOLAR CELLS
ISBN
0927-0248
Impact factor JCR
3,858
Impact info
Volume
Journal number
From page
1903
To page
1906
Month
JULIO
Ranking
Participants
  • Autor: Pablo Palacios Clemente (UPM)
  • Autor: Perla Wahnon Benarroch (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
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)