中国物理B ›› 2017, Vol. 26 ›› Issue (11): 116201-116201.doi: 10.1088/1674-1056/26/11/116201

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Ce–Co-doped BiFeO3 multiferroic for optoelectronic and photovoltaic applications

Jyoti Sharma, Deepak Basrai, A K Srivastava   

  1. Department of Physics, Lovely Professional University, Phagwara, Punjab, India
  • 收稿日期:2017-05-21 修回日期:2017-07-06 出版日期:2017-11-05 发布日期:2017-11-05

Ce–Co-doped BiFeO3 multiferroic for optoelectronic and photovoltaic applications

Jyoti Sharma, Deepak Basrai, A K Srivastava   

  1. Department of Physics, Lovely Professional University, Phagwara, Punjab, India
  • Received:2017-05-21 Revised:2017-07-06 Online:2017-11-05 Published:2017-11-05
  • Contact: A K Srivastava E-mail:srivastava_phy@yahoo.co.in

摘要: The Ce-Co-doped BiFeO3 multiferroic, Bi1-xCexFe1-xCoxO3 (x=0.00, 0.01, 0.03, and 0.05), has been prepared by a sol-gel auto-combustion method and analyzed through Raman spectroscopy, photoluminescence, and UV-visible spectroscopy. We have observed an anomalous intensity of the second-order Raman mode at~1260 cm-1 in pure BFO and suppressed intensity in doped samples, which indicates the presence of spin two-phonon coupling in these samples. The photoluminescence spectra show reduction in the intensity of emission with the increasing dopant concentration, which indicates the high charge separation efficiency. A sharp absorption with three charge transfer (C-T) and two d-d transitions are shown by UV-visible spectra in the visible region. The band gap of BiFeO3 (BFO) is decreasing with increasing dopant concentrations and the materials are suitable for photovoltaic applications.

关键词: Raman and UV-visible spectroscopy, photoluminescence and photo-voltaic applications

Abstract: The Ce-Co-doped BiFeO3 multiferroic, Bi1-xCexFe1-xCoxO3 (x=0.00, 0.01, 0.03, and 0.05), has been prepared by a sol-gel auto-combustion method and analyzed through Raman spectroscopy, photoluminescence, and UV-visible spectroscopy. We have observed an anomalous intensity of the second-order Raman mode at~1260 cm-1 in pure BFO and suppressed intensity in doped samples, which indicates the presence of spin two-phonon coupling in these samples. The photoluminescence spectra show reduction in the intensity of emission with the increasing dopant concentration, which indicates the high charge separation efficiency. A sharp absorption with three charge transfer (C-T) and two d-d transitions are shown by UV-visible spectra in the visible region. The band gap of BiFeO3 (BFO) is decreasing with increasing dopant concentrations and the materials are suitable for photovoltaic applications.

Key words: Raman and UV-visible spectroscopy, photoluminescence and photo-voltaic applications

中图分类号:  (Structural classes of nanoscale systems)

  • 62.23.-c
74.25.nd (Raman and optical spectroscopy) 78.55.-m (Photoluminescence, properties and materials)