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

Authors :: Rioult, M.
Datta, S.
Stanescu, D.
Stanescu, S.
Belkhou, R.
Maccherozzi, F.
Magnan, H.
Barbier, A.
Source :: Applied Physics Letters; 9/7/2015, Vol. 107 Issue 10, p1-4, 4p, 2 Diagrams, 2 Graphs
Publication Year :: 2015
Abstract: We demonstrate on prototypical samples containing a ferroelectric layer (BaTiO<subscript>3</subscript>/Nb:SrTiO<subscript>3</subscript>) 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 BaTiO<subscript>3</subscript> film is downward polarized. We explain this finding by the presence of an internal electric field which favors the separation of photo-generated charges. [ABSTRACT FROM AUTHOR]

Subjects :: BARIUM compounds
PHOTOCURRENTS
ANODES
FERROELECTRICITY
POLARIZATION (Electricity)

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