Polarization-enhanced photovoltaic response and mechanisms in Ni-doped (Bi0.93Gd0.07)FeO3 ceramics for self-powered photodetector
| Autor: | J. Anthoniappen, Yuan-Han Hsu, Pin-Yi Chen, Chi-Shun Tu, Cheng-Sao Chen |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science business.industry Schottky barrier Poling Photodetector Heterojunction 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Indium tin oxide Responsivity 0103 physical sciences Materials Chemistry Ceramics and Composites Optoelectronics Charge carrier Thin film 0210 nano-technology business |
| Zdroj: | Journal of the European Ceramic Society. 41:1934-1944 |
| ISSN: | 0955-2219 |
| Popis: | Multiferroic toxicity-free perovskite BiFeO3-based materials reveal potentials in photoelectrical conversion, energy harvesting and photodetector. This work highlights polarization-enhanced photovoltaic (PV) effects and mechanisms in B-site Ni-doped (Bi0.93Gd0.07)FeO3 ceramics with indium tin oxide (top electrode) and Au (bottom electrode) thin films. The enhanced PV effects are attributed to the reduced bandgap, polarization-modulated Schottky barrier, increased O 2p-Fe 3d orbital hybridization, and nucleation of domain walls to improve transportation of charge carriers. Improved PV parameters of responsivity (R) ∼1.71 × 10−2 A/W, detectivity (D*) ∼9.56 × 1011 Hz1/2/W (Jones), open-circuit voltage (Voc) ∼0.65 V, and short-circuit current density (Jsc) ∼80 μA/cm2 were obtained from the ITO/ (Bi0.93Gd0.07)(Fe0.97Ni0.03)O3/ Au heterostructure after 2 kV/cm poling under 405 nm irradiation at 103 W/m2 intensity. This work demonstrates that Ni-doped (Bi0.93Gd0.07)FeO3 ceramics can be potential candidates for self-powered UV photodetector. |
| Databáze: | OpenAIRE |
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