Effect of annealing temperature on the properties of spray deposited Cu<sub>2</sub>
SnS<sub>3</sub>
 thin films

Chalapathi, U.; Jayasree, Y.; Uthanna, S.; Raja, V. Sundara

doi:10.1002/pssa.201329157

Cited by 67 publications

(24 citation statements)

References 24 publications

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“…It may be an easy way to adjust the material's optical band gap by controlling the drying temperature. The near optimum band gap coupled with high absorption coefficient make CTS a potential absorber material for thin film solar cells [43,44] and in good agreement with reported values obtained by [45]. However, samples grown by RF magnetron sputtering at temperatures of 350-425°C in hydrogen sulfide and nitrogen atmosphere, showed band gap in the range 1.77-2.19 eV [46].…”

Section: Optical Propertiessupporting

confidence: 86%

Effect of drying temperature on the structural and optical characteristics of Cu2SnS3 thin films synthesized by simple spin coating technique

Rabaoui

Dahman

Dekhil

et al. 2015

J Mater Sci: Mater Electron

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Thin films of Cu 2 SnS 3 (CTS) were successfully prepared, by sol-gel spin coating technique on glass substrates. In this work, the effect of drying temperature on structural, morphological and optical characteristics is investigated. The X-ray diffraction patterns of the samples proved the polycrystalline nature and the formation of pure tetragonal Cu 2 SnS 3 structure with (112) preferential orientation. The AFM and SEM images revealed that the CTS films have continuous and dense morphology. The average crystallite sizes calculated using the Debye-Scherrer formula increased from 3 to 6 nm and the direct optical band gap increased from 1.10 to 1.34 eV with increasing drying temperature from 150 to 300°C. We found that by increasing the drying temperature, the sheet resistance decreased from 500 to 320 X. This makes the material as a good candidate for low cost and friendly environment thin film solar cells.

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Section: Optical Propertiessupporting

confidence: 86%

Effect of drying temperature on the structural and optical characteristics of Cu2SnS3 thin films synthesized by simple spin coating technique

Rabaoui

Dahman

Dekhil

et al. 2015

J Mater Sci: Mater Electron

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“…A recent theoretical work has suggested that this disorder takes the the form of compositional inhomogeneities caused by entropy-driven clustering (rather than fully random cation disorder), and could lead to potential fluctuations that negatively affect the carrier transport in Cu 2 SnS 3 [13]. It has been demonstrated that annealing Cu 2 SnS 3 thin films at higher temperatures promotes a transformation from the tetragonal to the monoclinic structure [14]. A few other studies have considered annealing of Cu 2 SnS 3 , including an investigation of the behavior of extrinsic oxygen defects in this material [15].…”

Section: Introductionmentioning

confidence: 99%

Effects of Disorder on Carrier Transport inCu2SnS3

et al. 2015

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In recent years, further improvements in the efficiency of Cu2ZnSn(S,Se)4 photovoltaic devices have been hampered due to several materials issues, including cation disorder. Cu2SnS3 is a promising new absorber material that has attracted significant interest in recent years. However, similar to CZTS, Cu2SnS3 displays cation disorder. In this work, we develop synthetic techniques to control the disorder in Cu2SnS3 thin films. By manipulating the disorder in this material, we observe crystal structure changes and detect improvements in the majority carrier (hole) transport. However, when the minority carrier (electron) transport was investigated using optical pump terahertz probe spectroscopy, minimal differences were observed between the ordered and disordered Cu2SnS3. By combining these results with first-principles and Monte Carlo theoretical calculations, we are able to conclude that even ostensibly "ordered" Cu2SnS3 displays minority carrier transport properties corresponding to the disordered structure. The presence of extended planar defects in all samples, observed in TEM imaging, suggests that disorder is present even when it is not detectable using traditional structural characterization methods. The results of this study highlight some of the challenges to the further improvement of Cu2SnS3-based photovoltaics, and have implications for other disordered multinary semiconductors such as CZTS.

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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%

“…Thin CTS films have been made using several techniques, spin coating [21][22][23][24], pulsed laser deposition from Cu 2 SnS 3 mulitcomponent targets [25]; doctor blade method [26] nano ink [27]; spray pyrolysis [28,30]; direct liquid coating [31,32]; sulfurizing Cu/Sn stacked precursors deposited on glass substrates by electron beam & H. Dahman h_dahman_2000@yahoo.com evaporation [33], sulfurizing, (Cu, Sn)S structured precursors prepared by successive ionic layer absorption and reaction (SILAR) [34,35]; annealing in sulphur atmosphere electrodeposited metals [18,36]; heat treatment of electrodeposited SnS-Cu layers [37], sulfurization of DC magnetron sputtered Sn-Cu stacks [38][39][40][41], direct evaporation of a synthesized Cu 2 SnS 3 powder [42], three steps method based on sulfurization of evaporated copper on sprayed SnS 2 film [43], sulfurization of a stack of vacuum-evaporated Cu and Sn films [44][45][46] route earlier used by Rezig and Dahman to prepare thin films of iron pyrite [47,48]. In this study, pure cubic structure Cu 2 SnS 3 films were grown by simple one-step spin coating technique from a single precursor's solution of Cu-Sn-thiourea complex.…”

Section: Introductionmentioning

confidence: 99%

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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Effect of annealing temperature on the properties of spray deposited Cu₂ SnS₃ thin films

Cited by 67 publications

References 24 publications

Effect of drying temperature on the structural and optical characteristics of Cu2SnS3 thin films synthesized by simple spin coating technique

Effect of drying temperature on the structural and optical characteristics of Cu2SnS3 thin films synthesized by simple spin coating technique

Effects of Disorder on Carrier Transport inCu2SnS3

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

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Effect of annealing temperature on the properties of spray deposited Cu2 SnS3 thin films

Cited by 67 publications

References 24 publications

Effect of drying temperature on the structural and optical characteristics of Cu2SnS3 thin films synthesized by simple spin coating technique

Effect of drying temperature on the structural and optical characteristics of Cu2SnS3 thin films synthesized by simple spin coating technique

Effects of Disorder on Carrier Transport inCu2SnS3

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

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Effect of annealing temperature on the properties of spray deposited Cu₂ SnS₃ thin films