Photovoltaic Effects of Bismuth Ferrite and Nd-Doped Barium Titanate Thin Films Prepared by Sol-Gel Method

Abstract:

Ferroelectric is a great potential material as new solar cells, light driver and optical sensor because of its anomalous photovoltaic effect. Bismuth ferrite and Nd-doped barium titanate thin films were prepared via sol–gel spin-coating method in the present study. The experimental results show that substitution of Nd³⁺ ions for Ba²⁺ on A sites leads to the decrease of band gap, and the short circuit photocurrent density, open circuit photovoltage and power conversion efficiency of Nd-doped barium titanate thin films begin to increase and reach the maximum and then decrease as Nd content increases. It has been found that the band gap of bismuth ferrite thin films annealed at 550–650^oC was between 2.306 eV and 2.453 eV. The short circuit photocurrent density decreased with the rise of annealing temperature, and the open circuit photovoltage and the power conversion efficiency of bismuth ferrite thin films annealed at 550^oC were higher than the thin films annealed at higher temperature.

• Periodical: Materials Science Forum (Volume 787)
• Pages: 347-351
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.787.347
• Online since: April 2014
• Authors: Chun Lin Fu*, Wei Cai, Ze Bin Lin, Wei Hai Jiang
• Keywords: Ferroelectric, Photovoltaic, Sol-Gel, Thin Film

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