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DS: Fachverband Dünne Schichten

DS 13: Layer Properties

DS 13.3: Vortrag

Mittwoch, 11. März 2026, 15:45–16:00, REC/B214

Optical tuning of Sr(Mo,Ti)O₃ thin films through solid solution — •Anjima Kallam Valli, Juliette Cardoletti, and Lambert Alff — Institute of Materials Science, TU Darmstadt, Darmstadt, Germany

Transparent conductive oxides are key materials in display technology and renewable energy applications, being used as transparent electrodes in solar cells and optoelectronic devices. Perovskite oxides such as SrMoO₃, SrVO₃, and SrNbO₃ exhibit exceptional metallic conductivity combined with optical transparency. Among them, bulk SrMoO₃ shows a conductivity of 2 * 10⁷ S m ⁻¹ exceeding that of platinum at room temperature; however, its optical transparency is limited to the UV visible range (300 to 500 nm). This work investigates the broadening of the transparency window of SrMoO₃ through partial B-site substitution of molybdenum by titanium. Titanium incorporation modifies the carrier density and thereby tunes the plasma frequency, shifting the optical reflection edge toward longer wavelengths. Epitaxial Ti-substituted SrMoO₃ thin films have been grown by pulsed laser deposition. Structural analysis was performed by XRD, and their electrical transport properties, including resistivity and carrier density, were characterised using van der Pauw and Hall-effect measurements. Optical transparency has been evaluated by spectroscopic analysis. Through tailoring of the transparency with varying Ti concentration, this work opens the door to various optoelectronic device applications.

Keywords: Transparent Conductive oxides; Pulsed Laser Deposition