Optical and Electrical Properties of Wurtzite Copper Indium Sulfide Nanoflakes

Ho, Jia Shin; Batabyal, Sudip Kumar; Pramana, Stevin S.; Lum, Jiayi; Pham, Viet Tuan; Li, Dehui; Xiong, Qihua; Tok, Alfred Iing Yoong; Wong, Lydia Helena

doi:10.1166/mex.2012.1091

Cited by 11 publications

(13 citation statements)

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“…According to the Hall effect measurement, all the synthesized CIGS NPs show a N-type conducting behavior, which should attribute to their sulfur-poor feature. The values of sheet resistivity, carrier concentration, and mobility listed in Table 2 are comparable to the reported values [ 49 , 50 ]. These results further suggest that the as-synthesized WZ-structured CIGS possess superior electrical properties over ZB-structured one.…”

Section: Resultssupporting

confidence: 85%

Phase-Selective Synthesis of CIGS Nanoparticles with Metastable Phases Through Tuning Solvent Composition

Zhang

Liu

et al. 2018

Nanoscale Res Lett

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I-III-VI2 compounds have shown great interests in the application of functional semiconductors. Among them, Cu(In,Ga)S2 has been a promising candidate due to its excellent optoelectronic properties. Although the polymorphs of Cu(In,Ga)S2 have been attracted extensive attentions, the efforts to developing the methodologies for phase-controlled synthesis of them are rare. In this paper, we reported a phase-selective synthesis of CIGS nanoparticles with metastable phases via simply changing the composition of solvents. For the wet chemistry synthesis, the microstructure of the initial nuclei is decisive to the crystal structure of final products. In the formation of Cu(In,Ga)S2, the solvent environment is the key factor, which could affect the coordination of monomers and influence the thermodynamic conditions of Cu-S nucleation. Moreover, wurtzite and zincblende Cu(In,Ga)S2 nanoparticles are selectively prepared by choosing pure en or its mixture with deionized water as reaction solvent. The as-synthesized wurtzite Cu(In,Ga)S2 possess a band gap of 1.6 eV and a carrier mobility of 4.85 cm2/Vs, which indicates its potential to construct a heterojunction with hexagonal-structured CdS for solar cells.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2781-1) contains supplementary material, which is available to authorized users.

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Section: Resultssupporting

confidence: 85%

Phase-Selective Synthesis of CIGS Nanoparticles with Metastable Phases Through Tuning Solvent Composition

Zhang

Liu

et al. 2018

Nanoscale Res Lett

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“…Since Pan et al 15 reported the hot-injection synthesis of CuInS 2 nanocrystals in zinc-blende and wurtzite phases for the first time, a number of studies have been concerned about the synthesis of metastable CuInS 2 nanocrystals. 16−19 In comparison with zinc-blende CuInS 2 , wurtzite CuInS 2 has attracted relatively broader research by various methods, including solvothermal synthesis, 13,20 hot injection, 21 thermal precipitation under an inert gas 22−25 or atmospheric 26−29 conditions, thermal decomposition of the precursor, 14,30−33 and so on.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The disordered structure and the potential application in solar cells are of great significance in exploring the controllable synthesis of metastable CuInS 2 nanocrystals stably at room temperature by a simple and low-cost method. Since Pan et al reported the hot-injection synthesis of CuInS 2 nanocrystals in zinc-blende and wurtzite phases for the first time, a number of studies have been concerned about the synthesis of metastable CuInS 2 nanocrystals. − In comparison with zinc-blende CuInS 2 , wurtzite CuInS 2 has attracted relatively broader research by various methods, including solvothermal synthesis, , hot injection, thermal precipitation under an inert gas − or atmospheric − conditions, thermal decomposition of the precursor, ,− and so on.…”

Section: Introductionmentioning

confidence: 99%

Spinel Indium Sulfide Precursor for the Phase-Selective Synthesis of Cu–In–S Nanocrystals with Zinc-Blende, Wurtzite, and Spinel Structures

et al. 2013

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Group I−III−VI ternary chalcogenides have attracted extensive attention as important functional semiconductors. Among them, Cu−In−S compounds have seen strong research interest due to their potential applications in high-efficiency solar cells. However, the controllable synthesis of Cu−In−S nanostructures with different phases is always difficult. In this research, zincblende CuInS 2 , wurtzite CuInS 2 , and spinel CuIn 5 S 8 could be selectively synthesized using spinel In 3−x S 4 as the precursor by a simple solvothermal method. X-ray powder diffraction was used to determine the phase and crystal structure, and transmission electron microscopy was employed to characterize the morphologies of the as-prepared samples. Experiments showed that the acidity−basicity of the reaction system and the coordination and reducibility of the capping ligands were crucial to the final phases of the products. The UV−vis−NIR spectra of the three phases all exhibited a broad-band absorption over the entire visible light and extending into the near-infrared region, and the zinc-blende, wurtzite, and spinel Cu−In−S nanocrystals showed band gaps of 1.55, 1.54, and 1.51 eV, respectively, which indicates their potential applications in thin-film solar cells.

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“…Raman spectroscopy is known to be an efficient tool for the identification of the crystal structure, stoichiometry, and secondary phases in ternary and quaternary chalcogenides . Only a few Raman scattering studies of uncommon phases of CuInS 2 have been reported so far , indicating that further more extensive experimental and theoretical investigations of lattice dynamics of CIS polymorphs are required. Here, the phonon spectra of orthorhombic CIS in the form of nanocrystallites with typical dimensions around 15 nm, are studied experimentally by means of off‐resonant and resonant Raman spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Raman scattering in orthorhombic CuInS₂ nanocrystals

Dzhagan

Litvinchuk

Valakh

et al. 2013

Physica Status Solidi (a)

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We report the results of non‐resonant and resonant Raman scattering in orthorhombic nanocrystalline CuInS2 semiconductor, supported by density functional first principle lattice dynamics calculations. A larger number of dominant phonon modes in comparison with standard tetragonal CuInS2 phases is shown to be associated with peculiarities of cation sublattice ordering and is the “fingerprint” of the corresponding structural polymorph. Good overall agreement is found between theoretical and experimental phonon mode frequencies.

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Optical and Electrical Properties of Wurtzite Copper Indium Sulfide Nanoflakes

Cited by 11 publications

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Phase-Selective Synthesis of CIGS Nanoparticles with Metastable Phases Through Tuning Solvent Composition

Phase-Selective Synthesis of CIGS Nanoparticles with Metastable Phases Through Tuning Solvent Composition

Spinel Indium Sulfide Precursor for the Phase-Selective Synthesis of Cu–In–S Nanocrystals with Zinc-Blende, Wurtzite, and Spinel Structures

Raman scattering in orthorhombic CuInS₂ nanocrystals

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Optical and Electrical Properties of Wurtzite Copper Indium Sulfide Nanoflakes

Cited by 11 publications

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Phase-Selective Synthesis of CIGS Nanoparticles with Metastable Phases Through Tuning Solvent Composition

Phase-Selective Synthesis of CIGS Nanoparticles with Metastable Phases Through Tuning Solvent Composition

Spinel Indium Sulfide Precursor for the Phase-Selective Synthesis of Cu–In–S Nanocrystals with Zinc-Blende, Wurtzite, and Spinel Structures

Raman scattering in orthorhombic CuInS2 nanocrystals

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Raman scattering in orthorhombic CuInS₂ nanocrystals