Precursor engineering for soft selective synthesis of phase pure metal-rich digenite (Cu9S5) and djurleite (Cu31S16) nanocrystals and investigation of their photo-switching characteristics

Yadav, Suraj Peerappa; Karmakar, Gourab; Shah, Alpa Y.; Vats, Bal Govind; Pathak, Ankita; Tyagi, Adish; Chauhan, Rohit Singh; Singh, Vishal

doi:10.1039/d4ra04524f

RSC Adv.

2024

DOI: 10.1039/d4ra04524f

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Precursor engineering for soft selective synthesis of phase pure metal-rich digenite (Cu₉S₅) and djurleite (Cu₃₁S₁₆) nanocrystals and investigation of their photo-switching characteristics

Suraj Peerappa Yadav,

Gourab Karmakar,

Alpa Y. Shah

et al.

Abstract: Two copper complexes, CuX(dmpymSH)(PPh3)2 (where X = Cl or I), were applied as efficient single source precursors for phase selective isolation of Cu9S5 (digenite) and Cu31S16 (djurleite) nanomaterials in pure form.

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Binuclear Cu-Pyrazinylthiolate Molecular Precursor as a Gateway to Binary CuS and Ternary CuInS₂, Cu₂SnS₃, and CuSbS₂ Nanoparticles

Karmakar,

Shah,

Kumar

et al. 2024

Crystal Growth & Design

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Copper-based binary and ternary sulfides have attracted significant attention due to their excellent photophysical properties, making them highly promising for high-performance photovoltaic devices. This study focuses on the synthesis and structural characterization of an air-stable binuclear Cu-pyrazinethiolate-phosphine complex, which serves as an efficient single-source molecular precursor for the preparation of CuS nanoplatelets. Furthermore, the utility of this complex as a versatile molecular precursor for the preparation of copper-based ternary sulfides, such as CuInS 2 , Cu 2 SnS 3 , and CuSbS 2 , has been demonstrated. A plausible mechanism for the facile formation of these ternary materials is proposed based on the presence of disulfide (S−S) linkages in CuS. The crystal structure, phase purity, and compositions of the nanoparticles were confirmed using powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), and area elemental mapping. Electron microscopic studies revealed the formation of a two-dimensional (2D) nanoplatelet morphology with varied shapes and sizes. Ultraviolet−visible (UV−vis) diffuse reflectance spectroscopy showed a slight blue shift in the band gap of the nanoparticles compared to their bulk counterparts, which can be attributed to quantum confinement or surface lattice distortion effects. The band gap and the pristine nanoparticles were found to be blue-shifted compared to the bulk material. Prototype photoelectrochemical cells, fabricated using pristine nanoparticles, exhibit nice photocurrent generation along with optimum photoswitching, which poses them as suitable materials for clean-energy applications.

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Binuclear Cu-Pyrazinylthiolate Molecular Precursor as a Gateway to Binary CuS and Ternary CuInS₂, Cu₂SnS₃, and CuSbS₂ Nanoparticles

Karmakar,

Shah,

Kumar

et al. 2024

Crystal Growth & Design

View full text Add to dashboard Cite

show abstract

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Precursor engineering for soft selective synthesis of phase pure metal-rich digenite (Cu₉S₅) and djurleite (Cu₃₁S₁₆) nanocrystals and investigation of their photo-switching characteristics

Abstract: Two copper complexes, CuX(dmpymSH)(PPh3)2 (where X = Cl or I), were applied as efficient single source precursors for phase selective isolation of Cu9S5 (digenite) and Cu31S16 (djurleite) nanomaterials in pure form.

Cited by 1 publication

References 58 publications

Binuclear Cu-Pyrazinylthiolate Molecular Precursor as a Gateway to Binary CuS and Ternary CuInS₂, Cu₂SnS₃, and CuSbS₂ Nanoparticles

Binuclear Cu-Pyrazinylthiolate Molecular Precursor as a Gateway to Binary CuS and Ternary CuInS₂, Cu₂SnS₃, and CuSbS₂ Nanoparticles

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Precursor engineering for soft selective synthesis of phase pure metal-rich digenite (Cu9S5) and djurleite (Cu31S16) nanocrystals and investigation of their photo-switching characteristics

Abstract: Two copper complexes, CuX(dmpymSH)(PPh3)2 (where X = Cl or I), were applied as efficient single source precursors for phase selective isolation of Cu9S5 (digenite) and Cu31S16 (djurleite) nanomaterials in pure form.

Cited by 1 publication

References 58 publications

Binuclear Cu-Pyrazinylthiolate Molecular Precursor as a Gateway to Binary CuS and Ternary CuInS2, Cu2SnS3, and CuSbS2 Nanoparticles

Binuclear Cu-Pyrazinylthiolate Molecular Precursor as a Gateway to Binary CuS and Ternary CuInS2, Cu2SnS3, and CuSbS2 Nanoparticles

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Precursor engineering for soft selective synthesis of phase pure metal-rich digenite (Cu₉S₅) and djurleite (Cu₃₁S₁₆) nanocrystals and investigation of their photo-switching characteristics

Binuclear Cu-Pyrazinylthiolate Molecular Precursor as a Gateway to Binary CuS and Ternary CuInS₂, Cu₂SnS₃, and CuSbS₂ Nanoparticles

Binuclear Cu-Pyrazinylthiolate Molecular Precursor as a Gateway to Binary CuS and Ternary CuInS₂, Cu₂SnS₃, and CuSbS₂ Nanoparticles