Manipulation of charge transport in ferroelectric-semiconductor hybrid for photoelectrochemical applications

Yang, Lin; Xiong, Yuli; Guo, Wenlong; Zhou, Ming; Song, Kena; Xiao, Peng; Cao, Guozhong

doi:10.1016/j.nanoen.2017.11.066

Cited by 52 publications

(27 citation statements)

References 49 publications

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“…The common approaches to realize self‐powered photodetectors are construction of p‐i‐n or Schottky junction, or integrated photoconductor with an energy conversion or harvester unit . Recently, ferroelectric semiconductors have proven to be potential candidates for photoelectric conversion materials because it can be polarized by external electric field and produce a built‐in electric field to separate electron–hole pairs . Thus, it is an alternative way to construct self‐driven photodetector by exploiting polarization‐induced electric filed effects .…”

Section: Introductionmentioning

confidence: 99%

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

Cao

Tian

Wang

et al. 2019

Adv Funct Materials

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Transparent and flexible photodetectors hold great promise in next-generation portable and wearable optoelectronic devices. However, most of the previously reported devices need an external energy power source to drive its operation or require complex fabrication processes. Herein, designed is a semitransparent, flexible, and self-powered photodetector based on the integrated ferroelectric poly(vinylidene-fluoride-trifluoroethylene) (P(VDF-TrFE)) and perovskite nanowire arrays on the flexible polyethylene naphthalate substrate via a facile imprinting method. Through optimizing the treatment conditions, including polarization voltage, polarization time, and the concentration of P(VDF-TrFE), the resulting device exhibits remarkable detectivity (7.3 × 10 12 Jones), fast response time (88/154 µs) at zero bias, as well as outstanding mechanical stability. The excellent performance is attributed to the efficient charge separation and transport originating from the highly oriented 1D transport pathway and the polarization-induced internal electric field within P(VDF-TrFE)/perovskite hybrid nanowire arrays.

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Section: Introductionmentioning

confidence: 99%

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

Cao

Tian

Wang

et al. 2019

Adv Funct Materials

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“…Moreover, the selected area electron diffraction image makes known that the main crystal planes of BTO are (100), (110), (111), (211), and (320) (Figure f), but the (200) plane exhibits a tiny scattering, revealing that the crystal plane spacing is split and matched well with the XRD data. Further, we carried out switching spectroscopy piezoresponse force microscopy technique to study the local polarization switching behavior and the local piezoresponse as a function of tip bias . This method is an effective characterization tool to directly observe the statics and dynamics of ferroelectric domains at nanometer scale, including amplitude and phase versus voltage for domain polarization and piezoelectric coefficient on material's surface.…”

mentioning

confidence: 99%

“…The multiplane‐exposed semiconductor combined with ferroelectric is beneficial for charge separation and transfer, so the (100) plane would carry out H 2 evolution, while O 2 evolution would occur at the (111) plane (Figure d). Due to the variable surface potential, the negative and positive charges will be accumulated at the (100) and (111) planes, respectively, creating downward and upward band structures at (100) and (111) planes (Figure e) . As, BTO ferroelectric dipoles are combined with Cu 2 O, which gets polarized by the surface potential gap.…”

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confidence: 99%

A Hybrid Artificial Photocatalysis System Splits Atmospheric Water for Simultaneous Dehumidification and Power Generation

et al. 2019

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A new approach for artificial photocatalysis of electrical generation directly from atmospheric water is reported. A hybrid system comprising a hydrogel incorporated with Cu2O and BaTiO3 nanoparticles is developed, wherein the Cu2O is designed to expose two different crystal planes, namely (100) and (111). These planes exhibit different surface potentials and form a polarization electric field of 2.3 kV cm−1 that acts on a ferroelectric dipole. With the help of this electric field, the dipole is redirected for aiding in positive and negative polarizations with (100) and (111) planes, then boosting water reduction and oxidation kinetics separately at (100) and (111) planes. Additonally, zinc‐/cobalt‐based superhygroscopic hydrogels serve as a water‐capturing “hand” to harness humidity from the ambient environment. The integrated hydrogel–Cu2O@BaTiO3 hybrid is used to dehumidify air, which can split 36.5 mg of water by employing only 150 mg hydrogel and simultaneously generate a photocurrent of 224.3 µA cm−2 under 10 mW cm−2 illumination.

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“…To reveal the mechanism of how E dp influences charge separation and transfer process, the schematic diagram of the formation of the E dp is shown in Figure S5 in the Supporting Information. E dp forms opposite to the polarization direction, caused by the charges accumulation on the photoanode surface . Figure b displays schematic band structures of the BFO/LN photoanode after −10, 0, and +10 V poling.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Charge Transfer by Passivation Layer in 3DOM Ferroelectric Heterojunction for Water Oxidation in HCO₃⁻/CO₂ System

Cai

Yang

Liu

et al. 2019

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Photoelectrochemical carbon dioxide conversion to fuels such as carbon monoxide, methanol, and ethylene exhibits great potential to solve energy issues. Unfortunately, CO2 conversion efficiency is still low due to violent charge recombination at the photoanode. Herein, a novel 3D macroporous ferroelectric heterojunction composed of BiFeO3 and LiNbO3 is developed by a template‐assisted sol–gel method, aiming at facilitating charge transfer kinetics. As expected, a tremendous enhancement of photocurrent density (300 times vs bare planar BiFeO3 film) and charge transfer efficiency (up to 76%) is obtained in the HCO3−/CO2 system without any cocatalyst. The photoelectrochemical performance is switchable by poling to form a depolarization electric field. Photoelectrochemical impedance spectroscopy reveals that the charge transfer resistance decreases due to the synergistic effect of BiFeO3 3D macroporous skeleton and LiNbO3 passivation layer by tuning surface states. These results suggest a novel strategy for enhancing photoelectrochemical water oxidation as the anodic reaction of CO2 reduction.

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Manipulation of charge transport in ferroelectric-semiconductor hybrid for photoelectrochemical applications

Cited by 52 publications

References 49 publications

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

A Hybrid Artificial Photocatalysis System Splits Atmospheric Water for Simultaneous Dehumidification and Power Generation

Enhanced Charge Transfer by Passivation Layer in 3DOM Ferroelectric Heterojunction for Water Oxidation in HCO₃⁻/CO₂ System

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Manipulation of charge transport in ferroelectric-semiconductor hybrid for photoelectrochemical applications

Cited by 52 publications

References 49 publications

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

A Hybrid Artificial Photocatalysis System Splits Atmospheric Water for Simultaneous Dehumidification and Power Generation

Enhanced Charge Transfer by Passivation Layer in 3DOM Ferroelectric Heterojunction for Water Oxidation in HCO3−/CO2 System

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Enhanced Charge Transfer by Passivation Layer in 3DOM Ferroelectric Heterojunction for Water Oxidation in HCO₃⁻/CO₂ System