Sharma, Savita and Tomar, Monika and Kumar, Ashok and Puri, Nitin K. and Gupta, Vinay (2016) Photovoltaic effect in BiFeO3/BaTiO3 multilayer structure fabricated by chemical solution deposition technique. Journal of Physics and Chemistry of Solids, 93. pp. 63-67. ISSN 0022-3697

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Photovoltaic (PV) properties of bismuth ferrite (BFO) and barium titanate (BTO) multilayered ferroelectric BFO/BTO/BFO/BTO thin film structure deposited on Pt/Ti/SiO2/Si substrates using chemical solution deposition technique are presented. X-ray diffraction analysis confirms pure phase polycrystalline nature of deposited perovskite multilayered structures. Simultaneously both distorted rhombohedral (R3c) and tetragonal phases (P4mm) of the respective BFO and BTO components are also well retained. The ferroelectric sandwiched structures grown on fused quartz substrates exhibit high optical transmittance (similar to 70%) with an energy band gap 2.62 eV. Current-voltage characteristics and PV response of multi layered structures is determined in metal-ferroelectric-metal (MFM) capacitor configuration. Considerably low magnitude of dark current density 1.53 x 10(-7) A at applied bias of 5 V establish the resistive nature of semi-transparent multilayered structure. Enhanced PV response with 40 nm thin semitransparent Au as top electrode is observed under solid-state violet laser illumination (lambda - 405 nm, 160 mW/cm(2)). The short circuit current density and open circuit voltage are measured to be 12.65 mu A/cm(2) and 1.43 V respectively with a high retentivity. The results obtained are highly encouraging for employing artificial multilayered engineering to improve PV characteristics.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Elsevier.
Subjects: Chemistry
Applied Physics/Condensed Matter
Depositing User: Dr. Rajpal Walke
Date Deposited: 12 Apr 2018 06:59
Last Modified: 12 Apr 2018 06:59

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