Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 13: Poster

DS 13.31: Poster

Donnerstag, 20. März 2025, 18:00–20:00, P1

"Green" Aqueous Synthesis and Characterization of Cu₂NiSnS₄ and Cu₂ZnSnS₄ Nanocrystal Thin Films — •Oleksandra Ivakhno-Tsehelnyk¹, Oleksandr Selyshchev¹, Serhiy Kondratenko², Volodymyr Dzhagan³, Lukas Hertling¹, and Dietrich R.T. Zahn¹ — ¹Semiconductor Physics & Research Center for Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, 09107 Chemnitz, Germany. — ²Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine. — ³Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, 03038 Kyiv, Ukraine.

We investigated thin films of Cu₂NiSnS₄ (CNTS) and Cu₂ZnSnS₄ (CZTS) nanocrystals (NCs) obtained by "green" colloidal synthesis [1,2]. This synthesis approach provides a way to non-toxic and scalable production for sustainable and low-cost light-absorbing nanomaterials. To assess the potential of thin films of these NCs for photovoltaic and other possible applications, electrical studies are necessary. Colloidal NCs were deposited on glass substrates by spin coating and annealed at temperatures starting from 180 ^∘C to obtain conductive thin films. Analytical techniques such as Raman spectroscopy, AFM, XRD, spectroscopic ellipsometry, and 4-point probe measurements were used to characterize their structural, optical, and electrical properties. We discuss the optical and electrical differences related to Zn-to-Ni substitution in the NC structure and establish the correlation between electrical properties of the films and elemental composition in both colloidal NCs and annealed films.

Keywords: CZTS; CNTS; thin films; annealing; electrical conductivity