Photoconductivity and photo-detection response of multiferroic bismuth iron oxide

Avneesh Anshul; Hitesh Borkar; Paritosh Singh; Prabir Pal; Sunil S Kushvaha; Ashok Kumar

doi:10.1063/1.4870626

Photoconductivity and photo-detection response of multiferroic bismuth iron oxide

Materials Science 2015-06-19 v1

Authors: Avneesh Anshul , Hitesh Borkar , Paritosh Singh , Prabir Pal , Sunil S Kushvaha , Ashok Kumar

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Abstract

We report visible light detection with in-plane BiFeO3 (BFO) thin films grown on pre-patterned inter-digital electrodes. In-plane configured BFO film displayed photocurrents with a 40:1 photo-to-dark-current ratio and improved photo-sensing ability for >15000 s (4 hrs) under small bias voltage (42V). Nearly sixty percent of the photo-induced charge carriers decay in 1.0 s and follow a double-exponential decay model. At 373 K the effect of light does not significantly increase the dark current, probably due to reduced mobility. Sub-bandgap weak monochromatic light (1 mw/cm2) shows one fold increase in photo-charge carriers.

Keywords

photoconductivity multiferroic bismuth iron oxide BiFeO3 thin films photo-detection charge carrier decay

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@article{arxiv.1403.6748,
  title  = {Photoconductivity and photo-detection response of multiferroic bismuth iron oxide},
  author = {Avneesh Anshul and Hitesh Borkar and Paritosh Singh and Prabir Pal and Sunil S Kushvaha and Ashok Kumar},
  journal= {arXiv preprint arXiv:1403.6748},
  year   = {2015}
}

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18 pages, 7 figures

Photoconductivity and photo-detection response of multiferroic bismuth iron oxide

Abstract

Keywords

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