dc.contributor.author
Baier, Robert
dc.contributor.author
Leendertz, Caspar
dc.contributor.author
Abou-Ras, Daniel
dc.contributor.author
Lux-Steiner, Martha
dc.contributor.author
Sadewasser, Sascha
dc.date.accessioned
2018-06-08T02:52:01Z
dc.date.available
2015-02-10T13:16:03.355Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/14024
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-18221
dc.description.abstract
The lack of an efficiency increase with increasing Ga content in Cu(In,Ga)Se2
solar cells has attracted much scientific interest. It has been claimed that
the physical properties of grain boundaries are responsible for this curious
effect. Here, we present an in-depth analysis of electronic potential barriers
at grain boundaries (GBs) in a series of Cu(In,Ga)Se2 (CIGSe) thin films using
Kelvin probe force microscopy (KPFM) measurements, extending our previous
study [Baier et al., Sol. Energy Mater. Sol. Cells 103 (2012) 86–92]. Here,
(i) we show, by comparison with data of the crystal lattice orientations, that
localization of GBs purely from KPFM topography data allows reliable
localization of GBs. (ii) We consider the averaging effect of KPFM due to
long-range electrostatic forces for the analysis of the electronic GB
properties to determine the real potential barrier height for each individual
GB; we determine potential variations ranging from −400 to +400 mV. (iii) We
consider the different physical origin of positive and negative potential
barriers and present a quantitative analysis of the results to determine
charge carrier concentration and defect densities at GBs. From our data and
analysis we do not observe any systematic variation of these quantities with
the Ga content.
en
dc.rights.uri
http://www.elsevier.com/about/open-access/green-open-access
dc.subject
Thin film solar cell
dc.subject
Grain boundaries
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik
dc.title
Properties of electronic potential barriers at grain boundaries in
Cu(In,Ga)Se2 thin films
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Solar Energy Materials and Solar Cells. - 130 (2014), S.124-131
dc.identifier.sepid
40682
dcterms.bibliographicCitation.doi
10.1016/j.solmat.2014.07.002
dcterms.bibliographicCitation.url
http://dx.doi.org/10.1016/j.solmat.2014.07.002
refubium.affiliation
Physik
de
refubium.affiliation.other
Institut für Experimentalphysik
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refubium.mycore.fudocsId
FUDOCS_document_000000021789
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000004494
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
09270248