Reference : Surface characterization of epitaxial Cu-rich CuInSe2 absorbers

	Document type :	Scientific congresses, symposiums and conference proceedings : Paper published in a journal
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/43864

Title :	Surface characterization of epitaxial Cu-rich CuInSe2 absorbers
Language :	English
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 >]
Publication date :	Jul-2019
Journal title :	IEEE Photovoltaic Specialists Conference. Conference Record
Publisher :	Institute of Electrical and Electronics Engineers
Peer reviewed :	Yes
Audience :	International
ISSN :	0160-8371
City :	Chicago
Country :	IL
Event name :	2019 IEEE 46th Photovoltaic Specialists Conference (PVSC)
Event date :	from 16-06-2019 to 21-06-2019
Keywords :	[en] 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.
Funders :	Fonds National de la Recherche - FnR
Permalink :	http://hdl.handle.net/10993/43864
DOI :	10.1109/PVSC40753.2019.8981200
Other URL :	https://ieeexplore.ieee.org/abstract/document/8981200/authors#authors
FnR project :	FnR ; FNR11696002 > Alex Redinger > GRISC > Grain boundaries in solar cells > 01/07/2018 > 30/06/2021 > 2017

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