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Title
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Secondary-phase-assisted grain boundary migration in CuInSe₂
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Author
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Abstract
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| Significant structural evolution occurs during the deposition of CuInSe2 solar materials when the Cu content increases. We use in situ heating in a scanning transmission electron microscope to directly observe how grain boundaries migrate during heating, causing nondefected grains to consume highly defected grains. Cu substitutes for In in the near grain boundary regions, turning them into a Cu-Se phase topotactic with the CuInSe2 grain interiors. Together with density functional theory and molecular dynamics calculations, we reveal how this Cu-Se phase makes the grain boundaries highly mobile. |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
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American Physical Society
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2020
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ISSN
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0031-9007
[print]
1079-7114
[online]
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DOI
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10.1103/PHYSREVLETT.124.095702
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Volume/pages
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124
:9
(2020)
, 6 p.
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Article Reference
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095702
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ISI
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000518464200009
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Pubmed ID
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32202872
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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