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Title: Photovoltaic properties of Aurivillius phase Bi{sub 5}FeTi{sub 3}O{sub 15} thin films grown by pulsed laser deposition

We report a remarkable photovoltaic effect in pulsed laser deposited multiferroic aurivillius phase Bi{sub 5}FeTi{sub 3}O{sub 15} (BFTO) thin films sandwiched between ZnO:Al transparent conductive oxide top electrode and SrRuO{sub 3} bottom electrode fabricated on amorphous fused silica substrates. The structural and micro structural properties of these films were analysed by X-ray diffraction and atomic force microscopy techniques. The films were showing a photo sensitive ferroelectric behaviour with a notable apparent polarization in the range of 10–15 μC/cm{sup 2}. These films also exhibited a switchable photo-response and this parameter was observed to be sensitive to polarisation field and the polarization direction. The device shows a large ON/OFF photo current ratio with an open circuit voltage of 0.14 V. The photo response at zero bias of this BFTO based heterostructures showed rapid increase to a saturation value of 6 μA at zero bias.
Authors:
 [1] ;  [2] ; ; ; ;  [1]
  1. Department of Physics and Institute for Functional Nanomaterials, University of Puerto Rico, P.O. Box 70377, San Juan, Puerto Rico 00936-8377 (United States)
  2. (India)
Publication Date:
OSTI Identifier:
22310901
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATOMIC FORCE MICROSCOPY; BISMUTH COMPOUNDS; ELECTRIC POTENTIAL; ELECTRODES; ENERGY BEAM DEPOSITION; FERROELECTRIC MATERIALS; IRON COMPOUNDS; LASER RADIATION; OPACITY; OXYGEN COMPOUNDS; PHOTOVOLTAIC EFFECT; POLARIZATION; RUTHENIUM COMPOUNDS; SILICA; STRONTIUM COMPOUNDS; SUBSTRATES; THIN FILMS; TITANIUM COMPOUNDS; X-RAY DIFFRACTION; ZINC OXIDES