Ferroelectric enhanced photoelectrochemical water splitting in BiFeO3/TiO2 composite photoanode

Xin, Wu; Li, Hongxia; Wang, Xiaoyang; Jiang, Liyun; Xi, Junhua; Du, Gang; Ji, Zhenguo

doi:10.1016/j.jallcom.2018.12.345

Cited by 52 publications

(16 citation statements)

References 38 publications

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“…Xin Wu et al utilized BiFeO 3 (BFO) on top of TiO 2 and found a photocurrent density as high as 11.25 mA/cm 2 , 20 times higher than that of bare TiO 2 [ 143 ]. The improvement is mainly due to the heterostructure of BFO/TiO 2 and the ferroelectric polarization due to the introduction of BFO, which could lead to upward bending at the interface and thus effectively drive the separation and transportation of photogenerated carriers [ 143 ].…”

Section: Experimental Researchmentioning

confidence: 99%

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

et al. 2021

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Hydrogen produced from water using photocatalysts driven by sunlight is a sustainable way to overcome the intermittency issues of solar power and provide a green alternative to fossil fuels. TiO2 has been used as a photocatalyst since the 1970s due to its low cost, earth abundance, and stability. There has been a wide range of research activities in order to enhance the use of TiO2 as a photocatalyst using dopants, modifying the surface, or depositing noble metals. However, the issues such as wide bandgap, high electron-hole recombination time, and a large overpotential for the hydrogen evolution reaction (HER) persist as a challenge. Here, we review state-of-the-art experimental and theoretical research on TiO2 based photocatalysts and identify challenges that have to be focused on to drive the field further. We conclude with a discussion of four challenges for TiO2 photocatalysts—non-standardized presentation of results, bandgap in the ultraviolet (UV) region, lack of collaboration between experimental and theoretical work, and lack of large/small scale production facilities. We also highlight the importance of combining computational modeling with experimental work to make further advances in this exciting field.

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Section: Experimental Researchmentioning

confidence: 99%

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

et al. 2021

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“…During the process of generating and transporting the photoelectrons and holes in the heterojunction, three main steps are included: rst, light is absorbed by the semiconductor, where the coupling of two semiconductors narrows the bandgap, thus increasing light absorption and generating more photoelectron-hole pairs; second, the photoelectrons generated would transfer to the conduction band (CB) from the valence band (VB), and the holes would stay in the VB; and third, since the CB and VB positions of BiOI are higher than those of BFO, the photoelectrons in the CB of BiOI would further transfer to the CB of BFO; furthermore, the holes in the VB of BFO would move to the VB of BiOI, and as a result of this transition, the photogenerated carriers were efficiently separated. Furthermore, the band bending at the interface between BFO and BiOI, which was induced by the spontaneous polarization of BFO, could accelerate carrier transfer, 31,37,38 thus improving the separation efficiency of photoelectrons and holes and extending the lifetime of the carriers, which contributes greatly to enhancing the PEC properties of the composite.…”

Section: Mechanistic Analysismentioning

confidence: 99%

Preparation and photoelectrochemical properties of BiFeO₃/BiOI composites

et al. 2020

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“…[102] In addition to semiconductor materials, some other materials have been developed to improve the performance of ferroelectric photovoltaic devices. [46,[108][109][110][111][112][113] A distinctive idea was proposed by Choi et al [114] who combined the ferroelectric material Bi 4 Ti 3 O 12 with LaCO 3 . The Mott insulator LaCO 3 performs specific position substitution in layered Bi 4 Ti 3 O 12 , which can effectively adjust the optical bandgap of the ferroelectric material without destroying the ferroelectricity.…”

Section: Combine With Other Materialsmentioning

confidence: 99%

Ferroelectric Photovoltaic Materials and Devices

Han

Yang

2021

Adv Funct Materials

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Ferroelectric materials have been a focus of much research over the last few decades for their unique piezoelectric and optoelectronic properties. Conventional solar cells have been devised based on the photovoltaic effect of semiconductor p–n junctions, with their photogenerated voltage being influenced by the bandgap of the semiconductors, limiting their further development. Ferroelectric photovoltaics have attracted attention for their unusual photovoltaic effect and controllability. The photogenerated voltage that is independent of bandgap along the polarization direction can be generated in ferroelectric materials, undoubtedly making up for the lack of solar cells. Ferroelectric materials have been used in a wide range of piezoelectric, storage, sensor, and optoelectronic because of their unique optical and electrical properties. However, the small photogenerated current of ferroelectric photovoltaic devices is one of the challenges that need to be overcome. Researchers have shown that the photogenerated current of ferroelectric photovoltaic devices can be significantly improved by cation doping and heterostructure construction, reigniting the enthusiasm for the investigation of ferroelectric photovoltaics. This paper reviews a variety of ferroelectric photovoltaic materials, the mechanism of ferroelectric photovoltaics, approaches for improving ferroelectric photovoltaic performance, and the applications and future prospects for ferroelectric materials.

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Ferroelectric enhanced photoelectrochemical water splitting in BiFeO3/TiO2 composite photoanode

Cited by 52 publications

References 38 publications

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

Preparation and photoelectrochemical properties of BiFeO₃/BiOI composites

Ferroelectric Photovoltaic Materials and Devices

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Ferroelectric enhanced photoelectrochemical water splitting in BiFeO3/TiO2 composite photoanode

Cited by 52 publications

References 38 publications

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

Preparation and photoelectrochemical properties of BiFeO3/BiOI composites

Ferroelectric Photovoltaic Materials and Devices

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Preparation and photoelectrochemical properties of BiFeO₃/BiOI composites