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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 |
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Author/s: |
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Item Type: | Article |
Título de Revista/Publicación: | IEEE Journal of Photovoltaics |
Date: | April 2015 |
ISSN: | 2156-3381 |
Subjects: | |
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.
Type | Code | Acronym | Leader | Title |
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Government of Spain | ENE2012-37804-C02-01 | PROMESA | Unspecified | Aplicación de estructuras cuánticas y otros nuevos conceptos a la mejora de la eficiencia de las células solares |
Item ID: | 34277 |
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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 |