Enhanced Photoelectrochemical Performance in Reduced Graphene Oxide/BiFeO3Heterostructures.
BiFeO3(BFO)-based ferroelectrics have been proved to be visible-light-driven photoelectrodes for O2production. However, the hitherto reported photoelectrochemical performances remain inferior to meet the requirements for any applications. Besides, expensive noble metals (Ag, Au) are commonly required to achieve high photoelectric conversion efficiency. Here, the significant enhancements of photoelectrochemical performance is reported by fabricating a noble-metal-free reduced graphene oxide (RGO)/BFO composite film via a simple and cost-effective solution process. The optimized RGO/BFO composite film exhibits a 600% improvement of the short-circuit photocurrent density compared to that of the pristine BFO, and also outperforms the noble-metal/BFO cells under the same reaction conditions. Furthermore, the incident photon-to-current efficiency of the optimized RGO/BFO sample shows threefold enhancement. This study delivers a facile and low-cost approach to preparing 2D materials/ferroelectric heterostructures and offers a promising pathway to boost the performance of semiconducting ferroelectric photoelectrodes.
College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China.
Yan
Y
Ren
College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China.
Feng
F
Nan
School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
Lu
L
You
School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
Yang
Y
Zhou
College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China.
Yanyan
Y
Wang
School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
Junling
J
Wang
College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China.
Xiaodong
X
Su
College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China.
Mingrong
M
Shen
College of Physics, Optoelectronics and Energy and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, P. R. China.
Liang
L
Fang
ferroelectrics; photoelectrochemical; photoelectrodes; reduced graphene oxide