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Fabrication and characterization of multiband solar cells based on highly mismatched alloys
Entity
UAM. Departamento de Física AplicadaPublisher
Institute of Physics PublishingDate
2015-10-13Citation
10.1088/1742-6596/647/1/012067
Journal of Physics: Conference Series 647.1 (2015): 012067
ISSN
1742-6588 (Print); 1742-6596 (Online)DOI
10.1088/1742-6596/647/1/012067Funded by
N. López acknowledges support of the European Commission by Marie Curie International Incoming Fellowship PIIF-GA-2012-326579. The authors also acknowledge the support from MINECO under TEC2013-48350-R projectProject
Gobierno de España. TEC2013-48350-R; info:eu-repo/grantAgreement/EC/FP7/326579Editor's Version
http://dx.doi.org/10.1088/1742-6596/647/1/012067Subjects
Characterization; Chemical beam epitaxy; Dynamics; Energy gap; FísicaRights
Institute of Physics PublishingAbstract
Multiband solar cells are one type of third generation photovoltaic devices in which an increase of the power conversion efficiency is achieved through the absorption of low energy photons while preserving a large band gap that determines the open circuit voltage. The ability to absorb photons from different parts of the solar spectrum originates from the presence of an intermediate energy band located within the band gap of the material. This intermediate band, acting as a stepping stone allows the absorption of low energy photons to transfer electrons from the valence band to the conduction band by a sequential two photons absorption process. It has been demonstrated that highly mismatched alloys offer a potential to be used as a model material system for practical realization of multiband solar cells. Dilute nitride GaAs1-xNx highly mismatched alloy with low mole fraction of N is a prototypical multiband semiconductor with a well-defined intermediate band. Currently, we are using chemical beam epitaxy to synthesize dilute nitride highly mismatched alloys. The materials are characterized by a variety of structural and optical methods to optimize their properties for multiband photovoltaic devices
Files in this item
Google Scholar:López, Nair
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Braña de Cal, Alejandro Francisco
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García Núñez, Carlos
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Hernández Muñoz, María Jesús
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Cervera Alajarín, Manuel
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Martínez, M.
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Yu, Kinman
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Walukiewicz, Wladyslaw
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García, B.J.
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