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

• 来源期刊: 中国物理B（英文版）
• 关键词: Raman and UV-visible spectroscopy photoluminescence and photo-voltaic applications
• 年，卷（期）: 2017,（11）
• 页码范围: 383-388
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/11/116201

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.