“Green” Aqueous Synthesis and Advanced Spectral Characterization of Size-Selected Cu2ZnSnS4 Nanocrystal Inks
Structure, composition, and optical properties of colloidal mercaptoacetate-stabilized Cu 2 ZnSnS 4 (CZTS) nanocrystal inks produced by a “green” method directly in aqueous solutions were characterized. A size-selective precipitation procedure using 2-propanol as a non-solvent allows separating a se...
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Veröffentlicht in: | Scientific reports 2018-09, Vol.8 (1), p.1-10, Article 13677 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Structure, composition, and optical properties of colloidal mercaptoacetate-stabilized Cu
2
ZnSnS
4
(CZTS) nanocrystal inks produced by a “green” method directly in aqueous solutions were characterized. A size-selective precipitation procedure using 2-propanol as a non-solvent allows separating a series of fractions of CZTS nanocrystals with an average size (bandgap) varying from 3 nm (1.72 eV) to 2 nm (2.04 eV). The size-selected CZTS nanocrystals revealed also phonon confinement, with the main phonon mode frequency varying by about 4 cm
−1
between 2 nm and 3 nm NCs. |
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ISSN: | 2045-2322 2045-2322 |
DOI: | 10.1038/s41598-018-32004-1 |