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Title: Ultrathin hematite photoanode with gradient Ti doping
Authors: Liu, Pengfei
Wang, Chongwu
Wang, Lijie
Wu, Xuefeng
Zheng, Lirong
Yang, Hua Gui
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Liu, P., Wang, C., Wang, L., Wu, X., Zheng, L., & Yang, H. G. (2020). Ultrathin hematite photoanode with gradient Ti doping. Research, 2020, 5473217-. doi:10.34133/2020/5473217
Journal: Research
Abstract: The poor photoelectrochemical (PEC) performance derived from insufficient charge separation in hematite photoanode crucially limits its application. Gradient doping with band bending in a large region is then considered as a promising strategy, facilitating the charge transfer ability due to the built-in electric field. Herein, we developed a synthetic strategy to prepare gradient Ti-doped ultrathin hematite photoelectrode and systematically investigated its PEC performance. The as-synthesized electrode (1.5-6.0% doping level from the surface to the substrate) delivered a photocurrent of about 1.30 mA cm-2 at 1.23 V versus the reversible hydrogen electrode (RHE), which is nearly 100% higher than that of homogeneously doped hematite electrode. The enhanced charge transfer property, induced by the energy band bending due to the built-in electric field, has been further confirmed by electrochemical measurements. This strategy of gradient doping should be adaptable and can be applied for other functional materials in various fields.
ISSN: 2096-5168
DOI: 10.34133/2020/5473217
Rights: © 2020 Pengfei Liu et al. Exclusive Licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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