Thermochromic SmNiO3-δ thin films deposited by magnetron sputtering and crystallized by soft-annealing in air - Université de Lorraine Access content directly
Journal Articles Scripta Materialia Year : 2022

Thermochromic SmNiO3-δ thin films deposited by magnetron sputtering and crystallized by soft-annealing in air

David Pilloud
Stéphanie Bruyère
Aurélien Didelot
Daria Kharkhan
Silvère Barrat
Fabien Capon

Abstract

Samarium nickelate (SmNiO3) exhibits a metal-insulator transition (MIT) around 120 °C and therefore appears to be an excellent candidate for a new generation of thermochromic solar absorbers. Nevertheless, this kind of perovskite is classically obtained under extreme conditions to stabilize the metastable Ni3+ oxidation state. Here, we show that SmNiO3-δ thin films can be synthesized under soft-annealing as the habitual orthorhombic distorted perovskite structure. The layers were deposited by reactive magnetron co-sputtering and subsequently annealed for crystallization for 2 h at 500 °C in air. Structural characterization was carried out using X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques, while optical and electrical properties were determined by Fourier transform infrared spectroscopy (FTIR) and the four-point probe method, respectively. The Ni3+ ion was confirmed by Electron energy loss spectroscopy (EELS). Finally, reversible thermochromic behavior was observed with an MIT temperature estimated at 138 °C and an IR contrast of 19%.

Dates and versions

hal-03936201 , version 1 (12-01-2023)

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Zil Fernández-Gutiérrez, David Pilloud, Stéphanie Bruyère, Aurélien Didelot, Daria Kharkhan, et al.. Thermochromic SmNiO3-δ thin films deposited by magnetron sputtering and crystallized by soft-annealing in air. Scripta Materialia, 2022, 218 (11), pp.114795. ⟨10.1016/j.scriptamat.2022.114795⟩. ⟨hal-03936201⟩
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