Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 4, Issue 22, Pages 3918-3923Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz402048p
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Funding
- National Science Foundation through the Division of Materials Research, Solid State and Materials Chemistry program [NSF-DMR-1309510]
- ISU for a Graduate Research Excellence Award
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1309510] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1040098] Funding Source: National Science Foundation
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Cu2ZnSnS4 (CZTS) is a promising material for solar energy conversion, but synthesis of phase-pure, anisotropic CZTS nanocrystals remains a challenge. We demonstrate that the initial concentration (loading) of cationic precursors has a dramatic effect on the morphology (aspect ratio) and composition (internal architecture) of hexagonal wurtzite CZTS nanorods. Our experiments strongly indicate that Cu is the most reactive of the metal cations; Zn is next, and Sn is the least reactive. Using this reactivity series, we are able to purposely fine-tune the morphology (dots versus rods) and degree of axial phase segregation of CZTS nanocrystals. These results will improve our ability to fabricate CZTS nanostructures for photovoltaics and photocatalysis.
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