Voltammetry investigation on copper zinc tin sulphide /selenide (CZTSxSe1-x) alloy nanocrystals: Estimation of composition dependent band edge parameters

Jadhav, Yogesh; Thakur, Priyanka; Haram, Santosh K.

doi:10.1016/j.solmat.2016.06.030

Cited by 22 publications

(21 citation statements)

References 47 publications

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“…Figure 3c shows the CV data for CZTS, with two peaks at −3.62 V (marked as A 1 ) and at −5.01 V (marked as C 1 ) over repeated cycles, which correspond to the anodic and cathodic peaks, respectively. The values obtained for the CZTS band edges are in very good agreement with the earlier report by Jadhav et al [21].…”

Section: Resultssupporting

confidence: 92%

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Interface Structure and Band Alignment of CZTS/CdS Heterojunction: An Experimental and First-Principles DFT Investigation

et al. 2019

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We report a phase-pure kesterite Cu2ZnSnS4 (CZTS) thin films, synthesized using radio frequency (RF) sputtering followed by low-temperature H2S annealing and confirmed by XRD, Raman spectroscopy and XPS measurements. Subsequently, the band offsets at the interface of the CZTS/CdS heterojunction were systematically investigated by combining experiments and first-principles density functional theory (DFT) calculations, which provide atomic-level insights into the nature of atomic ordering and stability of the CZTS/CdS interface. A staggered type II band alignment between the valence and conduction bands at the CZTS/CdS interface was determined from Cyclic Voltammetry (CV) measurements and the DFT calculations. The conduction and valence band offsets were estimated at 0.10 and 1.21 eV, respectively, from CV measurements and 0.28 and 1.15 from DFT prediction. Based on the small conduction band offset and the predicted higher positions of the VBmax and CBmin for CZTS than CdS, it is suggested photogenerated charge carriers will be efficient separated across the interface, where electrons will flow from CZTS to the CdS and and vice versa for photo-generated valence holes. Our results help to explain the separation of photo-excited charge carriers across the CZTS/CdS interface and it should open new avenues for developing more efficient CZTS-based solar cells.

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Section: Resultssupporting

confidence: 92%

“…The scan rate for the CV measurements is 100 Mv/s. At the end of each experiment, the potentials were recalibrated with respect to the normal hydrogen electrode (NHE), using ferrocene as an internal standard [21,22].…”

Section: Methodsmentioning

confidence: 99%

Interface Structure and Band Alignment of CZTS/CdS Heterojunction: An Experimental and First-Principles DFT Investigation

et al. 2019

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“…The Synthesis of the CZTS x Se 1− x ( x =0–1) nanocrystals carried out using hot injection method suggested by Agrawal and Riha et al [2] , [3] . A typical synthesis setup used in present investigation [1] is shown in Fig. 1 .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…3 (C) and (F) represents the low and high resolution images for x =0.74 respectively. The TEM images for the x =1 and x =0 are shown in [1] . For all compositions faceted morphology with polyhedron shapes having size ranging from 10 to 30 nm are observed.…”

Section: Characterization Of Czts X Se mentioning

confidence: 99%

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CZTS Se1− nanocrystals: Composition dependent method of preparation, morphological characterization and cyclic voltammetry data analysis

2016

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In this article, synthesis procedures of preparation of copper zinc tin sulpho-selenide (CZTSxSe1−x) alloy nanocrystals and the data acquired for the material characterization are presented. This data article is related to the research article doi: http://dx.doi.org/10.1016/j.solmat.2016.06.030 (Jadhav et al., 2016) [1]. FTIR data have been presented which helped in confirmation of adsorption of oleylamine on CZTSxSe1−x. Transmission electron microscopy (TEM), Field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM) data have been presented which have been used to reveal the morphological details of the nanocrystals. The Energy dispersive X-ray analysis (EDAX) based elemental mapping data has been presented to confirm the elemental composition of nanocrystals. Procedure for the preparation of CZTSxSe1−x based working electrode for the CV measurements have been given. The summary table for the optical, electrochemical band gaps, valance and conduction band edges as a function of composition are listed for the ready reference.

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CZTS/CdS: interface properties and band alignment study towards photovoltaic applications

Rondiya

Rokade

Sharma

et al. 2017

J Mater Sci: Mater Electron

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Voltammetry investigation on copper zinc tin sulphide /selenide (CZTSxSe1-x) alloy nanocrystals: Estimation of composition dependent band edge parameters

Cited by 22 publications

References 47 publications

Interface Structure and Band Alignment of CZTS/CdS Heterojunction: An Experimental and First-Principles DFT Investigation

Interface Structure and Band Alignment of CZTS/CdS Heterojunction: An Experimental and First-Principles DFT Investigation

CZTS Se1− nanocrystals: Composition dependent method of preparation, morphological characterization and cyclic voltammetry data analysis

CZTS/CdS: interface properties and band alignment study towards photovoltaic applications

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