Hexagonal Cu2SnS3 with metallic character: Another category of conducting sulfides

Wu, Changzheng; Hu, Zhenpeng; Wang, Chengle; Sheng, Hua Fei; Yang, Jinlong; Xie, Yi

doi:10.1063/1.2790491

Cited by 91 publications

(72 citation statements)

References 14 publications

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“…It should be noted that a hexagonal structure was reported previously, 18 in which the S anions are not tetrahedrally coordinated, but our total energy calculation shows that its energy is about 500 meV/atom higher than that of the mo-1 structure, suggesting that it cannot be an energetically stable structure. Recently we have predicted wurtzite-derived (hexagonal) polytype structures (wurtzite-kesterite and wurtzite-stannite) of the quaternary CZTS, in which the S anions are tetrahedrally coordinated by two Cu, one Zn and one Sn, and based on the similar derivation relation, we expect there may be wurtzite-derived CTS structures, but to our knowledge there have been no experimental reports about them.…”

Section: Crystal Structuresmentioning

confidence: 57%

Structural diversity and electronic properties of Cu2SnX3(X=S, Se): A fir

et al. 2011

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The ternary semiconductors Cu2SnX3 (X=S, Se) are found frequently as secondary phases in synthesized Cu2ZnSnS4 and Cu2ZnSnSe4 samples, but previous reports on their crystal structures and electronic band gaps are conflicting. Here we report their structural and electronic properties as calculated using a first-principles approach. We find that: (i) the diverse range of crystal structures such as the monoclinic, cubic and tetragonal phases can all be derived from the zinc-blende structure with tetrahedral coordination. (ii) The energy stability of different structures is determined primarily by the local cation coordination around anions, which can be explained by a generalized valence octet rule. Structures with only Cu3Sn and Cu2Sn2 clusters around the anions have low and nearly degenerate energies, which makes Cu and Sn partially disordered in the cation sublattice. (iii) The direct band gaps of the low energy compounds Cu2SnS3 and Cu2SnSe3 should be in the range of 0.8-0.9 eV and 0.4 eV respectively, and are weakly dependent on the long-range structural order. A direct analogy is drawn with the ordered vacancy compounds found in the Cu(In, Ga)Se2 (CIGS) solar cell absorbers.

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Section: Crystal Structuresmentioning

confidence: 57%

Structural diversity and electronic properties of Cu2SnX3(X=S, Se): A fir

et al. 2011

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“…However, recent work has shown NIR absorption from them that may be indicative of a LSPR, 154 and also metallic conductivity in some cases. 155 Whether this absorption/conductivity truly originates from them (for example due to mixed valence of the anion sublattice) and is not due to spurious Cu 2Àx S phases or even to d-d transitions related to Cu(II) species is something that needs to be carefully validated in the future. In general, all these ternary compounds will require more scrutiny in the near future.…”

Section: Discussionmentioning

confidence: 99%

New materials for tunable plasmonic colloidal nanocrystals

2014

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We present a review on the emerging materials for novel plasmonic colloidal nanocrystals. We start by explaining the basic processes involved in surface plasmon resonances in nanoparticles and then discuss the classes of nanocrystals that to date are particularly promising for tunable plasmonics: nonstoichiometric copper chalcogenides, extrinsically doped metal oxides, oxygen-deficient metal oxides and conductive metal oxides. We additionally introduce other emerging types of plasmonic nanocrystals and finally we give an outlook on nanocrystals of materials that could potentially display interesting plasmonic properties.

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“…Varieties of material structures have been reported in literature: cubic [6,34,[48][49][50], tetragonal [22, 23, 32-35, 38, 39, 50, 51-53], monoclinic [36,37,54], triclinic [24,29,55,56] and hexagonal phases [30,57]. The CTS polymorph is strongly affected by the grown temperature, however the influence of other parameters such as stoichiometry of the elements is not excluded.…”

Section: Methodsmentioning

confidence: 97%

Cu2SnS3 thin films deposited by spin coating route: a promise candidate for low cost, safe and flexible solar cells

Dahman

Mır

2015

J Mater Sci: Mater Electron

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Thin films of Cu 2 SnS 3 (CTS) was successfully grown on glass substrates by sol-gel spin coating technique. In this work, the effect of drying time on structural, morphological and optical characteristics is investigated while drying temperature was kept at 300°C. The samples were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), UV-Vis-NIR spectroscopy and four probe analysis. The XRD patterns of the samples proved the polycrystalline nature and the formation of pure cubic Cu 2 SnS 3 structure with (111) preferential orientation. No peak referring to other binary or ternary phases were detected in the patterns. The average crystallite sizes calculated using the DebyeScherrer formula was about 7.5 nm. The AFM and SEM images revealed that the CTS films have continuous and dense morphology. The films roughness increases from 8 to 68 nm with increasing drying time from 2 to 10 min. The thin films absorption coefficients were in the range 0.66 9 10 5 -1.38 9 10 5 cm -1 at 2.14 eV. We found that by increasing the drying time, the sheet resistance increased from 22 to 574 kX and the direct optical band gap increased from 1.19 to 1.65 eV. The synthesised material seems to be a good candidate for flexible, cheap and friendly environment solar cells applications.

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Hexagonal Cu2SnS3 with metallic character: Another category of conducting sulfides

Cited by 91 publications

References 14 publications

Structural diversity and electronic properties of Cu2SnX3(X=S, Se): A fir

Structural diversity and electronic properties of Cu2SnX3(X=S, Se): A fir

New materials for tunable plasmonic colloidal nanocrystals

Cu2SnS3 thin films deposited by spin coating route: a promise candidate for low cost, safe and flexible solar cells

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