UV-visible Spectra and Conductive Property of
Mn-doped BaTiO3 and Ba0.93Sr0.07TiO3 Ceramics
Yaping Qi1, Lanlan Zhang1, Guoxi Jin1, Ying Wan1, Yanxue Tang1,
Dongfang Xu1, Qizhuang He1, Yongxiang Li2, and Dazhi Sun1,*
1
Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai
Normal University, 100 Guilin Road, Shanghai 200234, China
2
Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi
Road, Shanghai 200050, China
Ferroelectric materials with perovskite structure show excellent piezoelectric,
dielectric, and pyroelectric performances. Additives affect microstructures and
electrical properties of ferroelectric materials significantly. BaTiO3 and BST materials
are promising candidates for UV-detection and UV protection. Optical properties of
Ba1−xSrxTiO3 (abbreviated as BST) and BaTiO3 ceramics have been reported
respectively. it is worth investigating the relationship between ultraviolet-visible
spectrum and conductive property in the doped ferroelectric ceramics because it is
helpful to understand related mechanisms. In this paper, the relationship between
ultraviolet-visible spectrum and conductive property in the doped ferroelectric
ceramics was analyzed. Results showed that the addition of MnO2 increases the
conductance in Mn-doped BaTiO3 ceramics. It is supposed that the dopant decreases
the band-gap energy between valence band and conduction band so that electrons
jump from the valence band to the conduction band easily. According to the
mechanism, similar electrical and optical behaviors were predicted in a parallel
system, Mn-doped barium strontium titanate ceramics, Ba0.93Sr0.07O3. The red-shift of
optical absorption edge and the increase of conductance were also observed in the
Mn-doped barium strontium titanate ceramics. Overall, this paper provides some new
and useful information for understanding the relationship between the conductivity
and UV-vis spectra in the doped ferroelectric ceramics, which is helpful for the
material to be applied in a certain range of waveband and to improve the performance
of related devices.
*Presenting author’s e-mail: sundazhi@shnu.edu.cn