Tailoring the photocurrent in BaTiO3/Nb:SrTiO3 photoanodes by controlled ferroelectric polarization

Maxime Rioult; Sukanya Datta; D. Stanescu; S. Stanescu; R Belkhou; F. Maccherozzi; Hélène Magnan; Antoine Barbier

Tailoring the photocurrent in BaTiO3/Nb:SrTiO3 photoanodes by controlled ferroelectric polarization

Maxime Rioult ¹ Sukanya Datta ¹ D. Stanescu ¹ S. Stanescu ² R Belkhou ² F. Maccherozzi ³ Hélène Magnan ¹ Antoine Barbier ¹

1 SPEC - UMR3680 - Service de physique de l'état condensé

2 SSOLEIL - Synchrotron SOLEIL

3 TASC - Laboratory TASC

Abstract : We demonstrate on prototypical samples containing a ferroelectric layer (BaTiO3/Nb:SrTiO3) that the efficiency of the system, used as photoanode, substantially depends on the polarization state of theferroelectric layer. We show a significant increase of the photocurrent by a factor larger than 2 when the BaTiO3 film is downward polarized. We explain this finding by the presence of an internal electric fieldwhich favors the separation of photo-generated charges

Document type :

Journal articles

Domain :

Physics [physics]

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https://hal-cea.archives-ouvertes.fr/cea-01349770
Contributor : Dominique Girard <>
Submitted on : Thursday, July 28, 2016 - 4:23:21 PM
Last modification on : Thursday, February 7, 2019 - 4:55:15 PM
Long-term archiving on : Saturday, October 29, 2016 - 11:24:17 AM

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Tailoring the photocurrent in BaTiO3/Nb:SrTiO3 photoanodes by controlled ferroelectric polarization

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