Enhanced Photovoltaic Effect in Fe‐Doped (Bi, Na) TiO3‐BaTiO3 Ferroelectric Ceramics

• DOI: 10.1111/ijac.12562
• Publication Date: 2016-07-04T06:24:50Z
• Authors: Lu Chen; Qianru Lin; Judy Hart; Sean Li; Danyang Wang
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

In this study, the photovoltaic (PV) effect in Fe‐doped (Bi0.5Na0.5)TiO3‐0.06BaTiO3 (BNBT) ceramics was investigated. It was found that the bandgap of BNBT is successfully narrowed through Fe doping and a substantially enhanced photovoltaic response was obtained in Fe‐doped BNBT. Density functional theory calculations show that the enhanced PV response can be attributed to the dopant, which introduces localized intermediate states within the band gap as well as a strong asymmetry of the projections of the responsible Fe‐Ti bond length on the c‐axis.