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Dzhagan, Volodymyr [Author]; Selyshchev, Oleksandr [Author]; Havryliuk, Yevhenii [Author]; Mazur, Nazar [Author]; Raievska, Oleksandra [Author]; Stroyuk, Oleksandr [Author]; Kondratenko, Serhiy [Author]; Litvinchuk, Alexander P. [Author]; Valakh, Mykhailo Ya. [Author]; Zahn, Dietrich R. T. [Author]

Raman and X-ray Photoelectron Spectroscopic Study of Aqueous Thiol-Capped Ag-Zn-Sn-S Nanocrystals

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  • Media type: E-Article
  • Title: Raman and X-ray Photoelectron Spectroscopic Study of Aqueous Thiol-Capped Ag-Zn-Sn-S Nanocrystals
  • Contributor: Dzhagan, Volodymyr [Author]; Selyshchev, Oleksandr [Author]; Havryliuk, Yevhenii [Author]; Mazur, Nazar [Author]; Raievska, Oleksandra [Author]; Stroyuk, Oleksandr [Author]; Kondratenko, Serhiy [Author]; Litvinchuk, Alexander P. [Author]; Valakh, Mykhailo Ya. [Author]; Zahn, Dietrich R. T. [Author]
  • imprint: MDPI, 2021
  • Published in: Materials 14(13), 3593 (2021). doi:10.3390/ma14133593
  • Language: English
  • DOI: https://doi.org/10.3390/ma14133593
  • ISSN: 1996-1944
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: The variation of the cationic composition in I2-II-IV-VI4 semiconductor compounds is aneffective tool for altering their properties in a controlled manner. In particular, a partial substitution ofCu for Ag in kesterite Cu2ZnSnS4 was proposed to suppress Cu-Zn antisite defects and the improvephotovoltaic performance. However, the efficiency of this approach may substantially depend on thefabrication route. Here, we report on the synthesis of (Cu,Ag)-Zn-Sn-S (CAZTS) and Ag-Zn-Sn-S (AZTS)nanocrystals (NCs) by means of "green" chemistry in aqueous solution and their detailedcharacterization by Raman spectroscopy and by several complementary techniques. Through asystematic variation of the nominal composition and quantification of the constituent elements inCAZTS and AZTS NCs by XPS, we identified the vibrational Raman and IR fingerprints of both themain AZTS phase and secondary phases of Ag-Zn-S and Ag-Sn-S compounds (for the first time). Theformation of the secondary phases of Ag-S and Ag-Zn-S cannot be avoided entirely for this type ofsynthesis. The Ag-Zn-S phase, having its bandgap in near infrared range, is the reason of the nonmonotonous dependence of the absorption edge of CAZTS NCs on the Ag content, with a trend toredshift even below the bandgaps of bulk AZTS and CZTS.
  • Access State: Open Access