American Chemical Society
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Sb2Se3 Thin-Film Growth by Solution Atomic Layer Deposition

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journal contribution
posted on 2022-10-22, 00:05 authored by Vanessa M. Koch, Jaroslav Charvot, Yuanyuan Cao, Claudia Hartmann, Regan G. Wilks, Ivan Kundrata, Ignacio Mínguez-Bacho, Negar Gheshlaghi, Felix Hoga, Tobias Stubhan, Wiebke Alex, Daniel Pokorný, Ece Topraksal, Ana-Sunčana Smith, Christoph J. Brabec, Marcus Bär, Dirk M. Guldi, Maïssa K. S. Barr, Filip Bureš, Julien Bachmann
We establish solution atomic layer deposition (sALD) for the controlled growth of pure Sb2Se3 thin films under mild conditions, namely, room temperature and atmospheric pressure. Upscaling this process yields Sb2Se3 thin films with high homogeneity over large-area (4″) substrates. Annealing of the initially amorphous material leads to highly crystalline and smooth Sb2Se3 thin films. Removing the constraints of thermal stability and sufficient volatility in sALD compared to traditional gas-phase ALD opens up a broad choice of precursors and allows us to examine a wide range of Se2– precursors, of which some exhibit facile synthetic routes and allow us to tune their reactivity for optimal experimental ease of use. Moreover, we demonstrate that the solvent used in sALD represents an additional, attractive tool to influence and tailor the reactivity at the liquid–solid interface between the precursors and the surface.