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

DOI: 10.1063/1.4930814 DOI Help

Authors: M. Rioult (CEA-Saclay) , S. Datta (CEA-Saclay) , D. Stanescu (CEA-Saclay) , S. Stanescu (Synchrotron Soleil) , R. Belkhou (Synchrotron Soleil) , F. Maccherozzi (Diamond Light Source) , H. Magnan (CEA-Saclay) , A. Barbier (CEA-Saclay)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Applied Physics Letters , VOL 107 (10)

State: Published (Approved)
Published: September 2015
Diamond Proposal Number(s): 10048

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 the ferroelectric 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 field which favors the separation of photo-generated charges.

Journal Keywords: Polarization; Atomic Force Microscopy; Photoelectric Conversion; Photoemission; Surface Photoemission

Subject Areas: Physics

Instruments: I06-Nanoscience