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Effect of sulfonating agent and ligand chemistry on structural and optical properties of CuSbS2 –particles prepared by heat-up method

Abstract

Chalcostibite copper antimony sulfide (CuSbS2) is a promising candidate for application in solar cells. The functionality of CuSbS2 –particles depends on particle size and morphology, and controlling of these two parameters during synthesis process is of uttermost importance. In this work, CuSbS2 particles were prepared by a facile heat-up synthesis method to investigate the effect of sulfur source on the structural and properties of CuSbS2 particles by utilizing sulfur powder (Su) and thiourea (Tu). Different morphologies were observed when Su and Tu were employed. Results demonstrate that the shape uniformity can be improved by applying a coordinating sulfur precursor (Tu). Moreover, nanoplatelet- and nanobrick-shaped particles were obtained by changing the ligand chemistry i.e. using a different combination of oleylamine (OLA), 1-octadecene (ODE), and oleic acid (OL). Band gap calculations show that CuSbS2 has direct and indirect bandgaps with a small difference of 0.2 eV. Composition analysis of samples obtained from Tu precursor revealed that antimony contents were different resulting in variation of lattice parameter c. Moreover, valence band (VB) and conduction band (CB) positions determined by cyclic voltammetry (CV) suggest that this material based on its composition can have dual applications. First, as an absorber in nanocrystalline solar cells and second, as a hole transport material in perovskite solar cells.

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Publication details

The article was received on 28 Nov 2017, accepted on 10 Feb 2018 and first published on 12 Feb 2018


Article type: Paper
DOI: 10.1039/C7CE02052J
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Effect of sulfonating agent and ligand chemistry on structural and optical properties of CuSbS2 –particles prepared by heat-up method

    S. Moosakhani, A. A. Sabbagh Alvani, R. Mohammadpour, J. Sainio, Y. GE and S. HANNULA, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C7CE02052J

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