Optical,electrical, and photoelectric properties of nitrogen-doped perovskite ferroelectric BaTiO3 ceramics |
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| Authors: | Peiqing Long Chen Chen Dongfang Pang Xitao Liu Zhiguo Yi |
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| Affiliation: | 1. CAS Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China;2. State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China |
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| Abstract: | Nitrogen-doped BaTiO3 (BT) ceramics were produced by the solid-state reaction method in conjunction with ammonia gas treatment. The optical absorption spectra results show that the bandgap of BT ceramic is narrowed after N-doping, suggesting that the N-doping is an effective route to increase light absorption. Polar properties measurements indicate that the ferroelectricity of BT ceramic is well maintained after the N-doping. In addition, the electric-field–induced strain is prominently improved to ~0.8% after N-doping, a value superior to that of PZT. Furthermore, the influence of N-doping on photoelectric properties of BT ceramics was also investigated. Large increase in photoconductivity and fast response to light illumination conditions were observed in N-doped BT ceramics. This work provides a novel route to enhance the (photo)electric properties of ferroelectric materials. |
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| Keywords: | bandgap tuning BaTiO3 lead-free ceramics photoelectric properties piezoelectric properties |
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