Band alignment at the Cu2SnS3/In2S3 interface measured by X-ray photoemission spectroscopy

Jia, Hongjie; Cheng, Shuying; Zhang, Hong; Yu, Jinling; Lai, Yunfeng

doi:10.1016/j.apsusc.2015.06.101

Cited by 14 publications

(6 citation statements)

References 26 publications

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“…The valence band edge and conduction band edge positions estimated with respect to NHE and local vacuum for CTS, CdS, and ZnS NPs are given in Table . Figure d shows the electronic band edge parameters for CTS samples available in the literature ,− compared with our results. Jia et al .…”

Section: Resultsmentioning

confidence: 99%

“…Jia et al . used the XPS-based valence band spectra analysis to estimate the valence band edge and took the difference between the optical band gap and valence band to assume the conduction band edge for the CTS/In 2 S 3 interface . Dias et al .…”

Section: Resultsmentioning

confidence: 99%

“…Jia et al used the XPS-based valence band spectra analysis to estimate the valence band edge and took the difference between the optical band gap and valence band to assume the conduction band edge for the CTS/In 2 S 3 interface. 66 67 The observed deviations in the band gap and band edge positions of CTS in Figure 5d could be attributed to differences in synthesis method, size, shapes, and more importantly techniques used for the estimation of the band edges.…”

Section: Cyclic Voltammetric Measurementsmentioning

confidence: 99%

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Ternary Cu₂SnS₃: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

et al. 2021

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Ternary Cu 2 SnS 3 (CTS) is an attractive nontoxic and earth-abundant absorber material with suitable optoelectronic properties for cost-effective photoelectrochemical applications. Herein, we report the synthesis of high-quality CTS nanoparticles (NPs) using a low-cost facile hot injection route, which is a very simple and nontoxic synthesis method. The structural, morphological, optoelectronic, and photoelectrochemical (PEC) properties and heterojunction band alignment of the as-synthesized CTS NPs have been systematically characterized using various state-of-the-art experimental techniques and atomistic first-principles density functional theory (DFT) calculations. The phase-pure CTS NPs confirmed by X-ray diffraction (XRD) and Raman spectroscopy analyses have an optical band gap of 1.1 eV and exhibit a random distribution of uniform spherical particles with size of approximately 15–25 nm as determined from high-resolution transmission electron microscopy (HR-TEM) images. The CTS photocathode exhibits excellent photoelectrochemical properties with PCE of 0.55% (fill factor (FF) = 0.26 and open circuit voltage (Voc) = 0.54 V) and photocurrent density of −3.95 mA/cm 2 under AM 1.5 illumination (100 mW/cm 2 ). Additionally, the PEC activities of CdS and ZnS NPs are investigated as possible photoanodes to create a heterojunction with CTS to enhance the PEC activity. CdS is demonstrated to exhibit a higher current density than ZnS, indicating that it is a better photoanode material to form a heterojunction with CTS. Consistently, we predict a staggered type-II band alignment at the CTS/CdS interface with a small conduction band offset (CBO) of 0.08 eV compared to a straddling type-I band alignment at the CTS/ZnS interface with a CBO of 0.29 eV. The observed small CBO at the type-II band aligned CTS/CdS interface points to efficient charge carrier separation and transport across the interface, which are necessary to achieve enhanced PEC activity. The facile CTS synthesis, PEC measurements, and heterojunction band alignment results provide a promising approach for fabricating next-generation Cu-based light-absorbing materials for efficient photoelectrochemical applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Cyclic Voltammetric Measurementsmentioning

confidence: 99%

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Ternary Cu₂SnS₃: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

et al. 2021

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“…Dashed lines refer to theoretical results while continuous lines refer to experimental results. Data taken from refs , , , , and − .…”

Section: Parasitic Minor Phasesmentioning

confidence: 99%

Impact of Minor Phases on the Performances of CZTSSe Thin-Film Solar Cells

Altamura

Vidal²

2016

Chem. Mater.

122

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Cu2ZnSn(S1–x Se x )4 (CZTSSe) alloys are promising candidates for low-cost and high-efficiency thin-film solar cells. Compared to CdTe and Cu(In x Ga1–x )Se2, CZTSSe uses chemicals found more abundantly on earth. This key aspect as well as its optical propertiesband gap range of 1.0–1.5 eV and absorption coefficient larger than 104 cm–1makes CZTSSe a feasible option for photovoltaic thin-film technologies scalable to TW/year. The key limitation to high efficiency in this technology remains a deficit in the open-circuit voltage with respect to the band gap: many groups have linked this drawback of CZTSSe solar cells to the presence of minor phases. This review aims to summarize what is known about CZTSSe minor phases and their impact on device characteristics.

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“…The positions of the conduction and valence bands of Fe 2 O 3 correspond to 0.30 and 2.42 eV, respectively. The conduction and valence bands of Cd-ZnIn 2.2 S y are −1.16 and 1.18 eV, respectively. In addition, as shown in Figure S6C,D, Fe 2 O 3 and Cd-ZnIn 2.2 S y can absorb light below 663 and 546 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

Photoelectrochemical Immunosensor Based on a 1D Fe₂O₃/3D Cd-ZnIn_2.2S_y Heterostructure as a Sensing Platform for Ultrasensitive Detection of Neuron-Specific Enolase

et al. 2022

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Lung cancer is a high-mortality cancer related to the concentration of neuron-specific enolase (NSE). In this work, a sandwich-type photoelectrochemical (PEC) immunosensor was constructed for ultrasensitive detection of NSE, which is based on iron trioxide/indium zinc cadmium sulfide (Fe2O3/Cd-ZnIn2.2S y ) as a sensing platform and Ag-modified polyaniline (Ag@PANI) as a signal amplification label. The 1D Fe2O3 porous nanorods with a large specific surface area were synthesized by calcination of Fe-MIL-88A and etching of NaOH. To improve the photocurrent response, the 3D architecture Cd-ZnIn2.2S y was combined with the 1D Fe2O3 porous nanorods to form a 1D Fe2O3/3D Cd-ZnIn2.2S y heterostructure. Specifically, the Fe2O3/Cd-ZnIn2.2S y heterostructure with a good energy level matching (the two can form a stepped energy level matching, which accelerates the transfer rate of electrons) can improve the separation efficiency of electron–hole pairs (e–/h+) under visible light irradiation, which enhances the photocurrent response. Ag@PANI has a strong electron transport capability and can be used as a secondary antibody marker for the signal amplification of the immunosensor. The sensor exhibits a good linear detection range of 100 fg/mL to 100 ng/mL with a low detection limit of 33.5 fg/mL. Moreover, the constructed sandwich-type PEC immunosensor shows good performance and possesses excellent specificity, selectivity, and stability over a period of 4 weeks for NSE detection. With these excellent properties, the immunosensor can be extended to analyze and diagnose other disease biomarkers.

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Band alignment at the Cu2SnS3/In2S3 interface measured by X-ray photoemission spectroscopy

Cited by 14 publications

References 26 publications

Ternary Cu₂SnS₃: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

Ternary Cu₂SnS₃: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

Impact of Minor Phases on the Performances of CZTSSe Thin-Film Solar Cells

Photoelectrochemical Immunosensor Based on a 1D Fe₂O₃/3D Cd-ZnIn_2.2S_y Heterostructure as a Sensing Platform for Ultrasensitive Detection of Neuron-Specific Enolase

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Band alignment at the Cu2SnS3/In2S3 interface measured by X-ray photoemission spectroscopy

Cited by 14 publications

References 26 publications

Ternary Cu2SnS3: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

Ternary Cu2SnS3: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

Impact of Minor Phases on the Performances of CZTSSe Thin-Film Solar Cells

Photoelectrochemical Immunosensor Based on a 1D Fe2O3/3D Cd-ZnIn2.2Sy Heterostructure as a Sensing Platform for Ultrasensitive Detection of Neuron-Specific Enolase

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Product

Resources

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Ternary Cu₂SnS₃: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

Ternary Cu₂SnS₃: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

Photoelectrochemical Immunosensor Based on a 1D Fe₂O₃/3D Cd-ZnIn_2.2S_y Heterostructure as a Sensing Platform for Ultrasensitive Detection of Neuron-Specific Enolase