Effect of sulfur annealing on the morphological, structural, optical and electrical properties of iron pyrite thin films formed from FeS2 nano-powder

Trinh, Thanh Kieu; Truong, Nguyen Tam Nguyen; Pham, Viet Thanh Hau; Kim, Hyoeun

doi:10.1007/s11814-018-0060-6

Cited by 16 publications

(8 citation statements)

References 23 publications

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“…It was then proposed that the excess of sulfur was mainly formed by sulfur with a coordination number different to that presented in FeS 2 or even to unbounded sulfur or polysulfides. This behavior of sulfur has been reported to occur in pyrite thin films on both SLG and Na-free substrates (amorphous quartz and alumina) [25,48,49]. Thus, our present results seem to suggest that this excess of sulfur is due to some intrinsic process closely related to the formation reactions of the pyrite thin films.…”

Section: Stoichiometry and Impurities: Influence Of The Substratesupporting

confidence: 79%

Imaging the Kirkendall effect in pyrite (FeS2) thin films: Cross-sectional microstructure and chemical features

et al. 2021

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Section: Stoichiometry and Impurities: Influence Of The Substratesupporting

confidence: 79%

Imaging the Kirkendall effect in pyrite (FeS2) thin films: Cross-sectional microstructure and chemical features

et al. 2021

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“…At this pressure, the conductivities of pyrite synthesized in 1, 2, and 4 h were 3.85, 12.5, and 14.3 S/cm. These results agree with other work showing that increasing grain sizeor decreasing grain boundaryand increasing crystallinity significantly reduced the resistivity of polycrystalline semiconductor films …”

Section: Resultssupporting

confidence: 93%

“…These results agree with other work showing that increasing grain size—or decreasing grain boundary—and increasing crystallinity significantly reduced the resistivity of polycrystalline semiconductor films. 38 …”

Section: Resultsmentioning

confidence: 99%

“…These results agree with other work showing that increasing grain sizeor decreasing grain boundaryand increasing crystallinity significantly reduced the resistivity of polycrystalline semiconductor films. 38 The electrochemical oxidation behavior for pyrite synthesized for the three reaction times was evaluated in terms of the relationship between the logarithm of current density and applied potential (Figure 7). The exchange current density (i 0 )a measure of electrochemical activitywas highest for pyrite synthesized in 1 h and lowest for pyrite synthesized in 4 h (Table 1).…”

Section: Resultsmentioning

confidence: 99%

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Hydrothermal Monodisperse Microspherulite Pyrite: Novel Synthesis Process and Electrochemical Study of Its Oxidation

Ghahreman

2020

ACS Omega

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A simple one-step hydrothermal method was developed to synthesize pyrite (FeS 2 ) sheet- and bulklike pyrite mineral. The Fe/S molar ratio determines the phase of FeS 2 , including pyrite and marcasite. The reaction temperature and time are key factors to regulate the structure, morphology, and size of pyrite. Scanning electron and transmission electron microscopy showed the formation of monodisperse microspherulite within 1 h reaction time, and the particles aggregated to large irregular polyhedron particles with increasing reaction time up to 4 h. Electrochemical oxidation tests demonstrated that their electrochemical activity significantly decreased with increasing synthesis time. At an elevated temperature of 200 °C, bulk pyrite was obtained after a 24 h reaction time, which could have promising applications in hydrothermal pyrite ore oxidation research.

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“…In recent years, inorganic semiconductors have been employed to generate clean energy in various optoelectronic and electrochemical fields, mainly because of their high stability under atmospheric conditions [1][2][3][4][5]. Among these, groups IV-VI tin-based binary sulfides such as tin monosulfide (SnS) and tin disulfide (SnS 2 ) have drawn much attention because of their abundance, low cost, non-toxicity, high catalytic activity, material diversity, structural multiformity, and excellent electrical conductivity [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Thioacetamide Concentration on the Preparation of Single-Phase SnS and SnS2 Thin Films for Optoelectronic Applications

et al. 2019

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Eco-friendly tin sulfide (SnS) thin films were deposited by chemical solution process using varying concentrations of a sulfur precursor (thioacetamide, 0.50–0.75 M). Optimized thioacetamide concentrations of 0.6 and 0.7 M were obtained for the preparation of single-phase SnS and SnS2 films for photovoltaic absorbers and buffers, respectively. The as-deposited SnS and SnS2 thin films were uniform and pinhole-free without any major cracks and satisfactorily adhered to the substrate; they appeared in dark-brown and orange colors, respectively. Thin-film studies (compositional, structural, optical, and electrical) revealed that the as-prepared SnS and SnS2 films were polycrystalline in nature; exhibited orthorhombic and hexagonal crystal structures with (111) and (001) peaks as the preferred orientation; had optimal band gaps of 1.28 and 2.92 eV; and exhibited p- and n-type electrical conductivity, respectively. This study presents a step towards the growth of SnS and SnS2 binary compounds for a clean and economical power source.

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Effect of sulfur annealing on the morphological, structural, optical and electrical properties of iron pyrite thin films formed from FeS2 nano-powder

Cited by 16 publications

References 23 publications

Imaging the Kirkendall effect in pyrite (FeS2) thin films: Cross-sectional microstructure and chemical features

Imaging the Kirkendall effect in pyrite (FeS2) thin films: Cross-sectional microstructure and chemical features

Hydrothermal Monodisperse Microspherulite Pyrite: Novel Synthesis Process and Electrochemical Study of Its Oxidation

Effect of Thioacetamide Concentration on the Preparation of Single-Phase SnS and SnS2 Thin Films for Optoelectronic Applications

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