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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/26193

Title: Refractive indices of layers and optical simulations of Cu(In,Ga)Se-2 solar cells
Authors: Carron, Romain
Avancini, Enrico
Feurer, Thomas
Bissig, Benjamin
Losio, Paolo A.
Figi, Renato
Schreiner, Claudia
Burki, Melanie
Bourgeois, Emilie
Remes, Zdenek
Nesladek, Milos
Buecheler, Stephan
Tiwari, Ayodhya N.
Issue Date: 2018
Abstract: Cu(In,Ga)Se-2-based solar cells have reached efficiencies close to 23%. Further knowledge-driven improvements require accurate determination of the material properties. Here, we present refractive indices for all layers in Cu(In,Ga)Se-2 solar cells with high efficiency. The optical bandgap of Cu(In,Ga)Se-2 does not depend on the Cu content in the explored composition range, while the absorption coefficient value is primarily determined by the Cu content. An expression for the absorption spectrum is proposed, with Ga and Cu compositions as parameters. This set of parameters allows accurate device simulations to understand remaining absorption and carrier collection losses and develop strategies to improve performances. [GRAPHICS] .
Notes: Carron, R (reprint author), Empa Swiss Fed Labs Mat Sci & Technol, Lab Thin Films & Photovolta, Dubendorf, Switzerland. romain.carron@empa.ch
URI: http://hdl.handle.net/1942/26193
DOI: 10.1080/14686996.2018.1458579
ISI #: 000432282300001
ISSN: 1468-6996
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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