Optimization of CIGSe bottom cell for spectral splitting device application

Medientyp: E-Artikel
Titel: Optimization of CIGSe bottom cell for spectral splitting device application
Beteiligte: Jehl‐Li‐Kao, Z.; Fukai, Hirofumi; Matsuyama, Isamu; Nakada, T.
Erschienen: Wiley, 2015
Erschienen in: physica status solidi c
Sprache: Englisch
DOI: 10.1002/pssc.201400308
ISSN: 1862-6351; 1610-1642
Schlagwörter: Condensed Matter Physics
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Anmerkungen:
Beschreibung: <jats:title>Abstract</jats:title><jats:p>We investigate on narrow bandgap CIGSe solar cells for tandem application in a spectral splitting devices. Numerical simulations using SCAPS are performed to optimize the Ga content throughout the absorber layer, depending on the illumination condition (AM 1.5 and tandem conditions using two different splitting filters; 620 nm and 880 nm). The simulations show a strong dependence of the efficiency on the minimum bandgap of the absorber, but not on the depth of the narrow bandgap region. Narrow bandgap CIGSe solar cells are experimentally realized and electrically characterized. A similar trend as what was deduced from the simulation is observed on the experiments when the solar cells are characterized in the tandem conditions. For the 880 nm splitting filter, an efficiency of 5.5% is experimentally obtained with a minimum bandgap of 1.05 eV. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</jats:p>

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