Wide-bandgap InAs/InGaP quantum-dot intermediate band solar cells

Ramiro Gonzalez, Iñigo and Villa, J. and Lam, P. and Hatch, S. and Wu, J. and López, E. and Antolín Fernández, Elisa and Liu, H.Y. and Martí Vega, Antonio and Luque López, Antonio (2015). Wide-bandgap InAs/InGaP quantum-dot intermediate band solar cells. "IEEE Journal of Photovoltaics" ; ISSN 2156-3381. https://doi.org/10.1109/JPHOTOV.2015.2402439.


Title: Wide-bandgap InAs/InGaP quantum-dot intermediate band solar cells
  • Ramiro Gonzalez, Iñigo
  • Villa, J.
  • Lam, P.
  • Hatch, S.
  • Wu, J.
  • López, E.
  • Antolín Fernández, Elisa
  • Liu, H.Y.
  • Martí Vega, Antonio
  • Luque López, Antonio
Item Type: Article
Título de Revista/Publicación: IEEE Journal of Photovoltaics
Date: April 2015
ISSN: 2156-3381
Freetext Keywords: quantum dots, intermediate band, solar cell characterization, intraband absorption.
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electrónica Física
UPM's Research Group: Silicio y Nuevos Conceptos para células solares
Creative Commons Licenses: None

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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.

Funding Projects

Government of SpainENE2012-37804-C02-01PROMESAUnspecifiedAplicación de estructuras cuánticas y otros nuevos conceptos a la mejora de la eficiencia de las células solares

More information

Item ID: 34277
DC Identifier: http://oa.upm.es/34277/
OAI Identifier: oai:oa.upm.es:34277
DOI: 10.1109/JPHOTOV.2015.2402439
Official URL: https://ieeexplore.ieee.org/document/7050277
Deposited by: Prof. Antonio Luque López
Deposited on: 10 Mar 2015 11:51
Last Modified: 30 May 2019 14:38
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