Simsek Sanli, E, Ramasse, QM orcid.org/0000-0001-7466-2283, Sigle, W et al. (5 more authors) (2016) Elemental redistributions at structural defects in Cu(In,Ga)Se₂ thin films for solar cells. Journal of Applied Physics, 120 (20). ARTN: 2053. ISSN 0021-8979
Abstract
The microstructural evolution of Cu(In,Ga)Se2 absorber layers during a three-stage-type co-evaporation process was studied to elucidate the effect of a Cu-rich stage on the formation of extended structural defects. Defect densities for two Cu-poor samples, one interrupted before and one after this crucial Cu-rich composition stage, were investigated by scanning transmission electron microscopy (STEM) imaging. The structure and chemical nature of individual defects were investigated by aberration-corrected high-resolution STEM in combination with electron energy-loss spectroscopy on the atomic-scale. In spite of the different defect densities between the two samples, most of the individual defects exhibited similar chemistry. In particular, the elemental distributions of atomic columns at {112} twin planes, which are very frequent in Cu(In,Ga)Se2 thin films, were found to be the same as in the defect-free grain interiors. In contrast, within grain boundaries, dislocation cores, and other structurally more complex defects, elemental redistributions of Cu and In were observed.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Jan 2019 14:19 |
Last Modified: | 11 Jan 2019 14:19 |
Status: | Published |
Publisher: | AIP Publishing |
Identification Number: | 10.1063/1.4967731 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:140912 |