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Surface characterization of epitaxial Cu-rich CuInSe2 absorbers
Martin Lanzoni, Evandro; Spindler, Conrad; Ramirez Sanchez, Omar et al.
2019In IEEE Photovoltaic Specialists Conference. Conference Record
Peer reviewed
 

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Keywords :
CISe; KPFM; Cu-rich
Abstract :
[en] We investigated the electrical properties of epitaxial Cu-rich CuInSe 2 by Kelvin probe force microscopy (KPFM) under ambient and ultra-high vacuum conditions. We first measured the sample under ambient conditions before and after potassium cyanide (KCN) etching. In both cases, we do not see any substantial contrast in the surface potential data; furthermore, after the KCN etching we observed outgrowths with a height around 2nm over the sample surface. On the other hand, the KPFM measurements under ultra-high vacuum conditions show a work function dependence according to the surface orientation of the Cu-rich CuInSe 2 crystal. Our results show the possibility to increase the efficiency of epitaxial Cu-rich CuInSe 2 by growing the materials in the appropriated surface orientation where the variations in work function are reduced.
Disciplines :
Physics
Author, co-author :
Martin Lanzoni, Evandro ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Spindler, Conrad ;  University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Physics and Materials Science Research Unit
Ramirez Sanchez, Omar ;  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
Redinger, Alex ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
External co-authors :
no
Language :
English
Title :
Surface characterization of epitaxial Cu-rich CuInSe2 absorbers
Publication date :
July 2019
Event name :
2019 IEEE 46th Photovoltaic Specialists Conference (PVSC)
Event date :
from 16-06-2019 to 21-06-2019
Audience :
International
Journal title :
IEEE Photovoltaic Specialists Conference. Conference Record
ISSN :
0160-8371
Publisher :
Institute of Electrical and Electronics Engineers, Chicago, United States - Illinois
Peer reviewed :
Peer reviewed
Focus Area :
Physics and Materials Science
FnR Project :
FNR11696002 - Grain Boundaries In Solar Cells, 2017 (01/07/2018-31/12/2021) - Alex Redinger
Funders :
FNR - Fonds National de la Recherche [LU]
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since 17 July 2020

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