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Article Dans Une Revue Journal of Alloys and Compounds Année : 2023

Insights on CaTiS3 films grown by pulsed laser deposition

Résumé

We attempt to grow perovskite CaTiS3 by pulsed laser deposition (PLD) on various substrates using a CaS:TiS2 target. Using Al2O3 (0001) substrates at 600 °C deposition temperature in vacuum, Ca1.0Ti1.05S2.48Oy stoichiometry is measured by Energy-dispersive X-ray spectroscopy (EDS) and Ca1.0Ti1.0S2.0O0.7 by Rutherford Backscattering Spectrometry (RBS). This indicates that when the films are grown in vacuum at moderate temperature, a high amount of S can be transferred from the target to the film. While no phase segregation of CaS and TiS2 could be observed, no perovskite CaTiS3 phase could be obtained, but rather a phase governed by van der Waals interactions. The films show a highly doped n-type semiconductor behavior with absorption coefficient in the 105 cm−1 range at 350–2500 nm but no surface photovoltage signal. This work should stimulate further experimental efforts in PLD growth of chalcogenides and chalcogenide perovskites.
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Dates et versions

hal-04163977 , version 1 (18-07-2023)

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Thomas Fix, Slimane Raissi, Dominique Muller, Corinne Bouillet, Daniele Preziosi, et al.. Insights on CaTiS3 films grown by pulsed laser deposition. Journal of Alloys and Compounds, 2023, 964, pp.171272. ⟨10.1016/j.jallcom.2023.171272⟩. ⟨hal-04163977⟩
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