Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Wide-Bandgap InAs/InGaP quantum-dot intermediate band solar cells
Year:2015
Research Areas
  • Solar cells
Information
Abstract
Current prototypes of quantum-dot intermediate band solar cells suffer from voltage reduction due to the existence of carrier thermal escape. An enlarged sub-bandgap EL would not only minimize this problem, but would also lead to a bandgap distribution that exploits more efficiently the solar spectrum. In this work we demonstrate InAs/InGaP QD-IBSC prototypes with the following bandgap distribution: EG = 1.88 eV, EH = 1.26 eV and EL > 0.4 eV. We have measured, for the first time in this material, both the interband and intraband transitions by means of photocurrent experiments. The activation energy of the carrier thermal escape in our devices has also been measured. It is found that its value, compared to InAs/GaAs-based prototypes, does not follow the increase in EL. The benefits of using thin AlGaAs barriers before and after the quantum-dot layers are analyzed.
International
Si
JCR
Si
Title
Ieee Journal of Photovoltaics
ISBN
2156-3381
Impact factor JCR
3
Impact info
Volume
5
10.1109/jphotov.2015.2402439
Journal number
3
From page
840
To page
845
Month
SIN MES
Ranking
Participants
  • Autor: Iñigo Ramiro Gonzalez (UPM)
  • Autor: Juan Villa Morales (UPM)
  • Autor: P. Lam
  • Autor: S. Hatch
  • Autor: J. Wu
  • Autor: Esther Lopez Estrada (UPM)
  • Autor: Elisa Antolin Fernandez (UPM)
  • Autor: H. Liu
  • Autor: Antonio Marti Vega (UPM)
  • Autor: Antonio Luque Lopez (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: 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)