Polarization-enhanced photovoltaic response and mechanisms in Ni-doped (Bi0.93Gd0.07)FeO3 ceramics for self-powered photodetector. Issue 3 (March 2021)

• Record Type: Journal Article
• Authors: Hsu, Yuan-Han; Chen, Pin-Yi; Tu, Chi-Shun; Chen, Cheng-Sao; Anthoniappen, J.
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 3(2021)
• Page Start: 1934
• Page End: 1944
• Publication Date: 2021-03
• Subjects: Photovoltaic conversion -- Schottky barrier -- Responsivity -- Specific detectivity -- Domain wall; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2020.10.037
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: 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 (Bi0.93 Gd0.07 )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 2 p -Fe 3 d 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 × 10 11 Hz 1/2 /W (Jones), open-circuit voltage (Voc ) ∼0.65 V, and short-circuit current density (Jsc ) ∼80 μA/cm 2 were obtained from the ITO/ (Bi0.93 Gd0.07 )(Fe0.97 Ni0.03 )O3 / Au heterostructure after 2 kV/cm poling under 405 nm irradiation at 10 3 W/m 2 intensity. This work demonstrates that Ni-doped (Bi0.93 Gd0.07 )FeO3 ceramics can be potential candidates for self-powered UV photodetector.