Synergistic enhancing photoelectrochemical response of Bi10O6S9 with WO3 optical heterojunction in wide wavelength range

Shi, Changchang; Zhou, Xiangyu; Li, Wanqing; Guo, Hongmei; Zhao, Yang; Ruan, Limin; Xu, Chao; Zeng, Wei

doi:10.1016/j.apsusc.2019.144697

Cited by 9 publications

(6 citation statements)

References 39 publications

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“…S10 b with equivalent circuit in inset. The series resistance (R s ) mainly reflects electrical contacts, wires, and sheet resistance of the electrodes [43,53]. The charge-transfer resistance (R tr ) means the charge-transfer property at the interface, and R rec means the recombination of carriers [43,54].…”

Section: Resultsmentioning

confidence: 99%

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

et al. 2020

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HIGHLIGHTS• Nanoscale multi-dimensional heterojunctions in situ grow at the edge of two-dimensional MXene conductive network.• A controlled anneal procedure in 150 °C is for preparing anatase TiO 2 /SnO 2 heterojunctions with oxygen vacancy scramble effect.• The perovskite solar cells achieve high power conversion efficiency and high moisture-resistance stability.ABSTRACT A multi-dimensional conductive heterojunction structure, composited by TiO 2 , SnO 2 , and Ti 3 C 2 T X MXene, is facilely designed and applied as electron transport layer in efficient and stable planar perovskite solar cells.Based on an oxygen vacancy scramble effect, the zero-dimensional anatase TiO 2 quantum dots, surrounding on two-dimensional conductive Ti 3 C 2 T X sheets, are in situ rooted on three-dimensional SnO 2 nanoparticles, constructing nanoscale TiO 2 /SnO 2 heterojunctions. The fabrication is implemented in a controlled lowtemperature anneal method in air and then in N 2 atmospheres. With the optimal MXene content, the optical property, the crystallinity of perovskite layer, and internal interfaces are all facilitated, contributing more amount of carrier with effective and rapid transferring in device. The champion power conversion efficiency of resultant perovskite solar cells achieves 19.14%, yet that of counterpart is just 16.83%. In addition, it can also maintain almost 85% of its initial performance for more than 45 days in 30-40% humidity air; comparatively, the counterpart declines to just below 75% of its initial performance.

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Section: Resultsmentioning

confidence: 99%

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

et al. 2020

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“…Meanwhile, it can be found that WO 3 tablets and Bi 10 O 6 S 9 nanosheets also form a WB heterojunction as shown in Figure d. It can be seen from Figure e,f, which are enlarged diagrams of the framed part in Figure d, the lattice spacing of WO 3 is 0.376 nm, corresponding to the (020) crystal plane, and that of Bi 10 O 6 S 9 is 0.323 nm. , Figure g–k shows the EDX mapping images of the Bi 10 O 6 S 9 /BP sample, which demonstrates the existence of P, Bi, O, and S elements. The layer of Bi 10 O 6 S 9 is small and its crystallinity is poor, so the interfacial structure of Bi 10 O 6 S 9 and WO 3 is not observed and only the phase can be determined.…”

Section: Resultsmentioning

confidence: 86%

“…The Fermi level of Ag is 0.4 eV . The CB, VB, and Fermi level of n-Si are −0.44, 0.66, and −0.25 eV, respectively, those of WO 3 are 0.35, 3.31, and 0.75 eV, respectively, those of Bi 10 O 6 S 9 are 0.33, 1.71, and 0.96 eV, respectively, and those of BP are −0.23, 0.48, and 0.36 eV, respectively . The band gaps of Si, WO 3 , Bi 10 O 6 S 9 , and BP are 1.1, 2.96, 1.38, and 0.71 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…He et al fabricated a Bi 2 S 3 /WO 3 heterojunction film to enhance PEC activity, mainly because the CB edge of WO 3 is more positive than that of Bi 2 S 3 and the band potential matching is advantageous for charge separation . In addition, in our previous studies, we also proposed that the WB p–n heterojunction film exhibits enhanced absorption and high photocurrent response under visible light illumination due to the presence of layered light-trapping nanostructures in the heterojunction …”

Section: Introductionmentioning

confidence: 84%

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Van der Waals Black Phosphorus/Bi₁₀O₆S₉ Heterojunction Harvesting Ambient Electric Field Energy for Enhanced Photoelectrochemical Sense

Zeng

Gui

et al. 2023

J. Phys. Chem. C

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Ingenious utilization of ambient energy is a vigorous issue for heterostructure-type devices in evoking their performance in various applications. Using the van der Waals effect, two-dimensional black phosphorus is developed to bond with a unique Bi10O6S9 layer, which then forms a type-II heterostructure based on a truncated pyramidal Si/Ag/WO3 substrate. It is demonstrated that the ambient electric field can not only promote the separation and transfer of the electrons (and holes) excited by light irradiation but also induce additional electrons (and holes) to migrate in the same direction as that of those excited by light irradiation. Under the action of a 1100 V m–1 ambient electric field, the photoelectrochemical response current of light irradiation is increased 1.6 times, while the stability of the photoelectrochemical response current can retain 81.06% of the initial value even after 6000 s. The thin black phosphorus layer alone contributes 1.75 times the response current. On this basis, a sensitive device for monitoring the weak physiological electric field of a human arm assisted by light irradiation was developed, which shows wide application prospects in wearable devices.

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“…When creating photoelectrodes based on advanced semiconductor materials for photoelectrochemical cells, it is necessary to take into account a number of factors that affect the efficiency of water splitting. Among these factors are the optical properties of nanomaterials, their electronic structure, and the catalytic properties for activating the evolution of hydrogen and oxygen in aqueous solutions [4][5][6][7]. In the formation of hybrid/nanocomposite and hetero/multilayer structures, these factors affect the generation and transfer of non-equilibrium charge carriers (photogenerated electrons/holes) in semiconductors, the lifetime of these carriers, and the efficiency of catalytically activated processes of water splitting [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Performance and Mechanism of Photoelectrocatalytic Activity of MoSx/WO3 Heterostructures Obtained by Reactive Pulsed Laser Deposition for Water Splitting

et al. 2020

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This work studies the factors that affect the efficiency of the photoelectrochemical hydrogen evolution reaction (HER) using MoSx/WO3 nano-heterostructures obtained by reactive pulsed laser deposition (RPLD) on glass substrates covered with fluorinated tin oxide (FTO). Another focus of the research is the potential of MoSx nanofilms as a precursor for MoOz(S) nanofilms, which enhance the efficiency of the photo-activated oxygen evolution reaction (OER) using the MoOz(S)/WO3/FTO heterostructures. The nanocrystalline WO3 film was created by laser ablation of a W target in dry air at a substrate temperature of 420 °C. Amorphous MoSx nanofilms (2 ≤ x ≤ 12) were obtained by laser ablation of an Mo target in H2S gas of varied pressure at room temperature of the substrate. Studies of the energy band structures showed that for all MoSx/WO3/FTO samples, photo-activated HER in an acid solution proceeded through the Z-scheme. The highest photoelectrochemical HER efficiency (a photocurrent density ~1 mA/cm2 at a potential of ~0 V under Xe lamp illumination (~100 mW/cm2)) was found for porous MoS4.5 films containing the highest concentration of catalytically active sites attributed to S ligands. During the anodic posttreatment of porous MoSx nanofilms, MoOz(S) films with a narrow energy band gap were formed. The highest OER efficiency (a photocurrent density ~5.3 mA/cm2 at 1.6 V) was detected for MoOz(S)/WO3/FTO photoanodes that were prepared by posttreatment of the MoSx~3.2 precursor. The MoOz(S) film contributed to the effective photogeneration of electron–hole pairs that was followed by the transport of photoelectrons from MoOz(S) into the WO3 film and the effective participation of holes possessing strong oxidation ability in the OER on the surface of the MoOz(S) film.

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Synergistic enhancing photoelectrochemical response of Bi10O6S9 with WO3 optical heterojunction in wide wavelength range

Cited by 9 publications

References 39 publications

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

Van der Waals Black Phosphorus/Bi₁₀O₆S₉ Heterojunction Harvesting Ambient Electric Field Energy for Enhanced Photoelectrochemical Sense

Performance and Mechanism of Photoelectrocatalytic Activity of MoSx/WO3 Heterostructures Obtained by Reactive Pulsed Laser Deposition for Water Splitting

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Synergistic enhancing photoelectrochemical response of Bi10O6S9 with WO3 optical heterojunction in wide wavelength range

Cited by 9 publications

References 39 publications

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

Van der Waals Black Phosphorus/Bi10O6S9 Heterojunction Harvesting Ambient Electric Field Energy for Enhanced Photoelectrochemical Sense

Performance and Mechanism of Photoelectrocatalytic Activity of MoSx/WO3 Heterostructures Obtained by Reactive Pulsed Laser Deposition for Water Splitting

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Van der Waals Black Phosphorus/Bi₁₀O₆S₉ Heterojunction Harvesting Ambient Electric Field Energy for Enhanced Photoelectrochemical Sense