Probing the growth window of LaVO3 perovskites thin films elaborated using magnetron co-sputtering

Christophe Celindano, Emile Haye, Stéphanie Bruyère, Pascal Boulet, Alexis Boileau, Sylvie Migot, Sandrine Mathieu, Patrice Miska, Silvère Barrat, Fabien Capon

Research output: Contribution to journalArticle

Abstract

LaVO3 is a promising material for tuning and improving solar cell performances when modifying the La/V stoichiometry. However, the production of LaVO3 thin films still requires a complex process (MBE, PLD), and the growth window of LaVO3 structure in terms of La/V ratio, already defined in the literature using hybrid-MBE is not determined for elaboration based on magnetron co-sputtering of both vanadium and lanthanum targets followed by an external reducing annealing that we use here. La/V ratio has been varied from 0.52 to 1.68 by changing the power applied to the vanadium target in order to synthesize films with different La/V ratios. The off-stoichiometry growth window has been investigated by complementary methods (XRD, XPS, FTIR and TEM). X-ray diffraction highlights the LaVO3 structure for all the films. For La-rich samples (La/V ratio >1.2), the formation of lanthanum oxide La2O3 is observed at the top surface and interface with the substrate, according to XPS, FTIR and TEM investigations. On the other hand, for V-rich samples, only a slight modification of the structure is observed below the La/V ratio = 0.6; with the presence of a new IR vibration mode corresponding to a small contribution of vanadium oxide(s) present in volume. Our study allows a better definition of the LaVO3 growth window in terms of La/V ratio, estimated from 0.6 to 1.2.

Original languageEnglish
Pages (from-to)16658-16665
Number of pages8
JournalCeramics International
Volume45
Issue number13
DOIs
Publication statusPublished - 1 Sep 2019

Fingerprint

Vanadium
Sputtering
Molecular beam epitaxy
Stoichiometry
Thin films
X ray photoelectron spectroscopy
Lanthanum oxides
Transmission electron microscopy
Lanthanum
Pulsed laser deposition
Oxides
Solar cells
Tuning
Annealing
X ray diffraction
Substrates

Keywords

  • Crystallization
  • Oxide
  • Perovskite
  • Sputtering
  • Thin film
  • Vanadate

Cite this

Celindano, Christophe ; Haye, Emile ; Bruyère, Stéphanie ; Boulet, Pascal ; Boileau, Alexis ; Migot, Sylvie ; Mathieu, Sandrine ; Miska, Patrice ; Barrat, Silvère ; Capon, Fabien. / Probing the growth window of LaVO3 perovskites thin films elaborated using magnetron co-sputtering. In: Ceramics International. 2019 ; Vol. 45, No. 13. pp. 16658-16665.
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Celindano, C, Haye, E, Bruyère, S, Boulet, P, Boileau, A, Migot, S, Mathieu, S, Miska, P, Barrat, S & Capon, F 2019, 'Probing the growth window of LaVO3 perovskites thin films elaborated using magnetron co-sputtering', Ceramics International, vol. 45, no. 13, pp. 16658-16665. https://doi.org/10.1016/j.ceramint.2019.05.208

Probing the growth window of LaVO3 perovskites thin films elaborated using magnetron co-sputtering. / Celindano, Christophe; Haye, Emile; Bruyère, Stéphanie; Boulet, Pascal; Boileau, Alexis; Migot, Sylvie; Mathieu, Sandrine; Miska, Patrice; Barrat, Silvère; Capon, Fabien.

In: Ceramics International, Vol. 45, No. 13, 01.09.2019, p. 16658-16665.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Probing the growth window of LaVO3 perovskites thin films elaborated using magnetron co-sputtering

AU - Celindano, Christophe

AU - Haye, Emile

AU - Bruyère, Stéphanie

AU - Boulet, Pascal

AU - Boileau, Alexis

AU - Migot, Sylvie

AU - Mathieu, Sandrine

AU - Miska, Patrice

AU - Barrat, Silvère

AU - Capon, Fabien

PY - 2019/9/1

Y1 - 2019/9/1

N2 - LaVO3 is a promising material for tuning and improving solar cell performances when modifying the La/V stoichiometry. However, the production of LaVO3 thin films still requires a complex process (MBE, PLD), and the growth window of LaVO3 structure in terms of La/V ratio, already defined in the literature using hybrid-MBE is not determined for elaboration based on magnetron co-sputtering of both vanadium and lanthanum targets followed by an external reducing annealing that we use here. La/V ratio has been varied from 0.52 to 1.68 by changing the power applied to the vanadium target in order to synthesize films with different La/V ratios. The off-stoichiometry growth window has been investigated by complementary methods (XRD, XPS, FTIR and TEM). X-ray diffraction highlights the LaVO3 structure for all the films. For La-rich samples (La/V ratio >1.2), the formation of lanthanum oxide La2O3 is observed at the top surface and interface with the substrate, according to XPS, FTIR and TEM investigations. On the other hand, for V-rich samples, only a slight modification of the structure is observed below the La/V ratio = 0.6; with the presence of a new IR vibration mode corresponding to a small contribution of vanadium oxide(s) present in volume. Our study allows a better definition of the LaVO3 growth window in terms of La/V ratio, estimated from 0.6 to 1.2.

AB - LaVO3 is a promising material for tuning and improving solar cell performances when modifying the La/V stoichiometry. However, the production of LaVO3 thin films still requires a complex process (MBE, PLD), and the growth window of LaVO3 structure in terms of La/V ratio, already defined in the literature using hybrid-MBE is not determined for elaboration based on magnetron co-sputtering of both vanadium and lanthanum targets followed by an external reducing annealing that we use here. La/V ratio has been varied from 0.52 to 1.68 by changing the power applied to the vanadium target in order to synthesize films with different La/V ratios. The off-stoichiometry growth window has been investigated by complementary methods (XRD, XPS, FTIR and TEM). X-ray diffraction highlights the LaVO3 structure for all the films. For La-rich samples (La/V ratio >1.2), the formation of lanthanum oxide La2O3 is observed at the top surface and interface with the substrate, according to XPS, FTIR and TEM investigations. On the other hand, for V-rich samples, only a slight modification of the structure is observed below the La/V ratio = 0.6; with the presence of a new IR vibration mode corresponding to a small contribution of vanadium oxide(s) present in volume. Our study allows a better definition of the LaVO3 growth window in terms of La/V ratio, estimated from 0.6 to 1.2.

KW - Crystallization

KW - Oxide

KW - Perovskite

KW - Sputtering

KW - Thin film

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