Photocurrent enhancement of perovskite heterojunction by plasmonic nanoparticles and ferroelectric polarization

Journal Article · Mon Feb 17 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4865801· OSTI ID:22283144

Chen, S. W.; Fang, C. Y.; Chen, C. H. ^[1]

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1. Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan (China)

Perovskite oxides—Pb{sub 0.86}La{sub 0.14}TiO{sub 3} (PLT), AgNbO{sub 3} (ANO), and SrTiO{sub 3} (STO)—were deposited consecutively on ITO/glass substrates to form layered composite photoelectrodes. These materials were chosen for their specific electronic band structures to form efficient photocatalytic heterojunctions and similar crystalline structures to minimize interface defects. Two additional methods were adopted to increase the photocurrent density of the composites: (1) plasmonic gold nanoparticles were introduced at the PLT/ITO interface to enhance light scattering and absorption while not becoming electron trapping centers and (2) the ferroelectric PLT layer was electrically poled toward the ANO layer to create a favorable band bending for electron transfer.

• OSTI ID: 22283144
• Journal Information: Applied Physics Letters, Vol. 104, Issue 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ELECTRON TRANSFER
ELECTRONIC STRUCTURE
FERROELECTRIC MATERIALS
GOLD
HETEROJUNCTIONS
INTERFACES
LAYERS
LIGHT SCATTERING
NANOSTRUCTURES
NIOBATES
PARTICLES
PEROVSKITE
PHOTOCATALYSIS
PLASMONS
POLARIZATION
SILVER COMPOUNDS
STRONTIUM TITANATES
SUBSTRATES
TRAPPING