A significant enhancement of bulk charge separation in photoelectrocatalysis by ferroelectric polarization induced in CdS/BaTiO3 nanowires

Efficient charge separation, in particular bulk charge separation (BCS), is one of the most critical factors in determining the performance of photoelectrochemical (PEC) water-splitting.

Download Full-text

Efficient charge separation and transfer of a TaON/BiVO4 heterojunction for photoelectrochemical water splitting

RSC Advances ◽

10.1039/d1ra00974e ◽

2021 ◽

Vol 11 (22) ◽

pp. 13269-13273

Author(s):

Na Li ◽

Yi Jiang ◽

Xiaodi Wang ◽

Chongyang Hu ◽

Wenchao Jiang ◽

...

Keyword(s):

Water Splitting ◽

Water Oxidation ◽

Charge Separation ◽

Photoelectrochemical Water Splitting ◽

Significant Enhancement ◽

Efficient Charge ◽

Photoelectrochemical Water Oxidation

TaON/BiVO4 heterojunction electrodes exhibited significant enhancement in the photoelectrochemical water oxidation.

Download Full-text

Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO2 electrode for photoelectrochemical water splitting

Chemical Science ◽

10.1039/c6sc01611a ◽

2016 ◽

Vol 7 (9) ◽

pp. 6076-6082 ◽

Cited By ~ 77

Author(s):

Ailong Li ◽

Zhiliang Wang ◽

Heng Yin ◽

Shengyang Wang ◽

Pengli Yan ◽

...

Keyword(s):

Water Splitting ◽

Charge Separation ◽

Rutile Phase ◽

Interface Structure ◽

Photoelectrochemical Water Splitting ◽

Tio2 Electrode ◽

Phase Alignment ◽

Efficient Charge

The key to phase junctions for efficient charge separation is to consider both the phase alignment and interface structure.

Download Full-text

Regulation of Ferroelectric Polarization to Achieve Efficient Charge Separation and Transfer in Particulate RuO 2 /BiFeO 3 for High Photocatalytic Water Oxidation Activity

Small ◽

10.1002/smll.202007044 ◽

2021 ◽

Vol 17 (3) ◽

pp. 2007044

Author(s):

Jafar H. Shah ◽

Biaohong Huang ◽

Ahmed M. Idris ◽

Yong Liu ◽

Anum S. Malik ◽

...

Keyword(s):

Water Oxidation ◽

Charge Separation ◽

Ferroelectric Polarization ◽

Oxidation Activity ◽

Efficient Charge

Download Full-text

Regulation of Ferroelectric Polarization to Achieve Efficient Charge Separation and Transfer in Particulate RuO 2 /BiFeO 3 for High Photocatalytic Water Oxidation Activity

Small ◽

10.1002/smll.202003361 ◽

2020 ◽

Vol 16 (44) ◽

pp. 2003361

Author(s):

Jafar H. Shah ◽

Biaohong Huang ◽

Ahmed M. Idris ◽

Yong Liu ◽

Anum S. Malik ◽

...

Keyword(s):

Water Oxidation ◽

Charge Separation ◽

Ferroelectric Polarization ◽

Oxidation Activity ◽

Efficient Charge

Download Full-text

Implementation of ferroelectric materials in photocatalytic and photoelectrochemical water splitting

Nanoscale Horizons ◽

10.1039/d0nh00219d ◽

2020 ◽

Vol 5 (8) ◽

pp. 1174-1187

Author(s):

Yi Li ◽

Jun Li ◽

Weiguang Yang ◽

Xudong Wang

Keyword(s):

Water Splitting ◽

Ferroelectric Materials ◽

Photoelectrochemical Water Splitting ◽

Ferroelectric Polarization ◽

Pec Water Splitting

This review unravels the interaction of PC and PEC water splitting with interfacial ferroelectric polarization.

Download Full-text

Efficient solar-driven water splitting by nanocone BiVO4-perovskite tandem cells

Science Advances ◽

10.1126/sciadv.1501764 ◽

2016 ◽

Vol 2 (6) ◽

pp. e1501764 ◽

Cited By ~ 221

Author(s):

Yongcai Qiu ◽

Wei Liu ◽

Wei Chen ◽

Guangmin Zhou ◽

...

Keyword(s):

Water Splitting ◽

Light Absorption ◽

Diffusion Length ◽

Narrow Band ◽

Low Cost ◽

High Water ◽

Hydrogen Electrode ◽

Efficient Charge ◽

Multiple Light Scattering ◽

Pec Water Splitting

Bismuth vanadate (BiVO4) has been widely regarded as a promising photoanode material for photoelectrochemical (PEC) water splitting because of its low cost, its high stability against photocorrosion, and its relatively narrow band gap of 2.4 eV. However, the achieved performance of the BiVO4 photoanode remains unsatisfactory to date because its short carrier diffusion length restricts the total thickness of the BiVO4 film required for sufficient light absorption. We addressed the issue by deposition of nanoporous Mo-doped BiVO4 (Mo:BiVO4) on an engineered cone-shaped nanostructure, in which the Mo:BiVO4 layer with a larger effective thickness maintains highly efficient charge separation and high light absorption capability, which can be further enhanced by multiple light scattering in the nanocone structure. As a result, the nanocone/Mo:BiVO4/Fe(Ni)OOH photoanode exhibits a high water-splitting photocurrent of 5.82 ± 0.36 mA cm−2 at 1.23 V versus the reversible hydrogen electrode under 1-sun illumination. We also demonstrate that the PEC cell in tandem with a single perovskite solar cell exhibits unassisted water splitting with a solar-to-hydrogen conversion efficiency of up to 6.2%.

Download Full-text

Enhancement of photoelectrochemical performance in ferroelectric films via the introduction of an Au buffer layer

Journal of Semiconductors ◽

10.1088/1674-4926/42/11/112701 ◽

2021 ◽

Vol 42 (11) ◽

pp. 112701

Author(s):

Dawei Cao ◽

Ming Li ◽

Jianfei Zhu ◽

Yanfang He ◽

Tong Chen ◽

...

Keyword(s):

Electric Field ◽

Buffer Layer ◽

Water Splitting ◽

Charge Separation ◽

Sol Gel ◽

Ferroelectric Films ◽

Photoelectrochemical Performance ◽

Band Bending ◽

Polarization Electric Field ◽

Pec Water Splitting

Abstract The inefficient separation of photogenerated carriers has become a serious problem that limits the photoelectrochemical (PEC) performance of semiconductors. Herein, a sol-gel method was used to prepare BiFeO3 ferroelectric thin films with FTO and FTO/Au as substrates, respectively. The polarization electric field of the ferroelectric can more effectively separate the carriers generated in the photoelectrode. Meanwhile, the introduction of an Au buffer layer can reduce the resistance in the process of charge transfer, accelerate the carrier migration, and enhance the efficiency of the charge separation. Under light irradiation, Au/BiFeO3 photoelectrode exhibited an extraordinary improvement in PEC water splitting compared with BiFeO3. In addition, the ferroelectric polarization electric field causes band bending, which further accelerates the separation of electrons and holes and improves the PEC performance of the photoelectrode. This work promotes the effective application of ferroelectric films in PEC water splitting.

Download Full-text