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Properties of self-oxidized single crystalline perovskite N : BaTiO$_3$ oxynitride epitaxial thin films

Anyssa Derj 1 Hélène Magnan 1 Cristian Mocuta 2 Patrick Le Fèvre 2 Jocelyne Leroy 3 Antoine Barbier 1 
1 LEPO - Laboratoire d'Electronique et nanoPhotonique Organique
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
3 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : Epitaxial perovskite self-oxidized oxynitride N : BaTiO$_3$thin films, deposited on 1% Nb-doped SrTiO$_3$(001) single crystals, were obtained by atomic nitrogen assisted molecular beam epitaxy without supplying additional oxygen gas. Their growth, crystalline and electronic structures as well as photo-electrochemical and optical properties were investigated and compared to those of pure BaTiO$_3$ films grown with atomic oxygen on the same substrate. More tetragonal perovskite crystalline structures, profound electronic structure modifications, improved photo-electrochemical properties and an enhanced (almost 10%) optical window for light absorption are demonstrated. This new class of compounds shows promise for a large panel of new applications based on visible light absorption.
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Submitted on : Friday, April 1, 2022 - 2:15:58 PM
Last modification on : Friday, September 2, 2022 - 10:01:06 AM
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Anyssa Derj, Hélène Magnan, Cristian Mocuta, Patrick Le Fèvre, Jocelyne Leroy, et al.. Properties of self-oxidized single crystalline perovskite N : BaTiO$_3$ oxynitride epitaxial thin films. Materials Advances, Royal Society of Chemistry, 2022, 3, pp.3135-3142. ⟨10.1039/D1MA01082D⟩. ⟨cea-03627060⟩

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