Article (Scientific journals)
High‐performance low bandgap thin film solar cells for tandem applications
ELANZEERY, Hossam; BABBE, Finn; MELCHIORRE, Michele et al.
2018In Progress in Photovoltaics, p. 1-6
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Keywords :
admittance steps; deep defects; high‐performance solar cells; low bandgap CIGS; quasi‐Fermi‐level splitting; tandem applications
Abstract :
[en] Thin film tandem solar cells provide a promising approach to achieve high efficiencies. These tandem cells require at least a bottom low bandgap and an upper high bandgap solar cell. In this contribution, 2 high‐performance Cu(In,Ga)Se2 cells with bandgaps as low as 1.04 and 1.07 eV are presented. These cells have shown certified efficiencies of 15.7% and 16.6% respectively. Measuring these cells under a 780‐nm longpass filter, corresponding to the bandgap of a typical top cell in tandem applications (1.57 eV), they achieved efficiencies of 7.9% and 8.3%. Admittance measurements showed no recombination active deep defects. One additional high‐performance CuInSe2 thin film solar cell with bandgap of 0.95 eV and efficiency of 14.1% is presented. All 3 cells have the potential to be integrated as bottom low bandgap cells in thin film tandem applications achieving efficiencies around 24% stacked with an efficient high bandgap top cell.
Disciplines :
Physics
Author, co-author :
ELANZEERY, Hossam ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
BABBE, Finn ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
MELCHIORRE, Michele  ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
WERNER, Florian ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
SIEBENTRITT, Susanne ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
External co-authors :
no
Language :
English
Title :
High‐performance low bandgap thin film solar cells for tandem applications
Publication date :
28 May 2018
Journal title :
Progress in Photovoltaics
ISSN :
1062-7995
eISSN :
1099-159X
Publisher :
John Wiley & Sons Ltd., Chichester, United Kingdom
Pages :
1-6
Peer reviewed :
Peer Reviewed verified by ORBi
FnR Project :
FNR8267152 - Cu Rich Cis - The Effect Of Potassium Treatment, 2014 (01/02/2015-31/01/2018) - Susanne Siebentritt
Name of the research project :
CURI-K, SURPASS
Funders :
FNR - Fonds National de la Recherche
Available on ORBilu :
since 06 August 2018

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