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Influence of stoichiometry and temperature on quasi Fermi level splitting of sulfide CIS absorber layers
Lomuscio, Alberto; Melchiorre, Michele; Siebentritt, Susanne
2018In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC, p. 1922-1924
Peer reviewed
 

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Keywords :
CIS; Cu-poor and Cu-rich absrobers; Energy conversion; Open circuit voltage; Photoelectrochemical cells; Photoluminescence; Photovoltaic cells; Solar cells; Stoichiometry; Sulfur compounds; Absorber layers; Cu-poor; Deep defects; Quasi-Fermi level splitting; Record efficiencies; Room-temperature photoluminescence; Fermi level
Abstract :
[en] CuInS-based solar cells suffer from a low open circuit voltage. Absorbers grown under both Cu-excess and Cudeficiency have been used to fabricate record efficiency photovoltaic cells. In this work, we present the influence of stoichiometry on the quality of absorbers by means of calibrated room temperature photoluminescence and quasi Fermi level splitting evaluation (qFLs). Deep defects-related photoluminescence decreases using higher Cu/In ratio, leading to a corresponding improvement in qFLs, with values above 900 meV for high copper rich absorbers. © 2018 IEEE.
Research center :
University of Luxembourg
Disciplines :
Physics
Identifiers :
eid=2-s2.0-85059914311
Author, co-author :
Lomuscio, Alberto ;  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
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 :
Influence of stoichiometry and temperature on quasi Fermi level splitting of sulfide CIS absorber layers
Publication date :
29 November 2018
Event name :
7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
Event place :
Waikoloa Village, United States
Event date :
10 June 2018 through 15 June 2018
Journal title :
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
ISSN :
0160-8371
Publisher :
Institute of Electrical and Electronics Engineers Inc.
Pages :
1922-1924
Peer reviewed :
Peer reviewed
Funders :
Fonds National de la Recherche Luxembourg
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