Cu2SnSe3 and alloyed (ZnSe)x(Cu2SnSe3)1−x nanocrystals with a metastable zincblende and wurtzite structure

Li, Shenjie; Pan, Daocheng

doi:10.1016/j.jcrysgro.2012.07.045

Cited by 21 publications

(24 citation statements)

References 34 publications

(44 reference statements)

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“…In Cu/Sn ratio of 1.4, we can see that Cu 2 SnSe 3 peak turn into Cu 2 SnSe 3 and Cu 2-x Se peak. Carolin M. Fella et al said CZTSe return to second phase at Se atmosphere [6]. Hence, we infer Cu 2 SnSe 3 return Cu 2-x Se and SnSe.…”

Section: Resultsmentioning

confidence: 52%

“…As a result, similar crystal structure p-type semiconductor material with fewer elements to reduce complexity is available such as the ternary Cu-Sn-Se system. Cu 2 SnSe 3 is a suitable candidate for photovoltaic application due to its direct-band-gap energy of 0.8-1.7 eV, an high absorption coefficient of 10 4 to 10 5 cm −1 [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and selenization of Cu<inf>2</inf>SnSe<inf>3</inf> nanocrystals by a novel solution method

Chen

Shei

2015

2015 International Symposium on Next-Generation Electronics (ISNE)

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In this study, we firstly synthesized ternary Cu 2 SnSe 3 nano ink by novel organic solvent polyetheramine by solvent-thermal reflux method. Cu 2 SnSe 3 thin films were prepared by solvent-thermal reflux method for Cu/Sn ratio in three different ratios of 2/1, 1.8/1, and 1.4/1. Structure, surface morphology, composition, and electrical and optical properties at different process conditions were measured. SEM micrograph also shown that with Cu/Sn ratio increase, surface have many voids, not uniform for grain size and shape due to nonuniform grown second phase. In this experiment we display a nonvacuum based method to fabricate Cu 2 SnSe 3 based device has been made to study copper factor on device performance. Furthermore, the selenization caused volume expansion of the film, and larger grains were consequently obtained in the CZTSe thin film. We proved that our method has great potential for further optoelectronic device due to low cost, high throughput and composition dependent properties.

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Section: Resultsmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Synthesis and selenization of Cu<inf>2</inf>SnSe<inf>3</inf> nanocrystals by a novel solution method

Chen

Shei

2015

2015 International Symposium on Next-Generation Electronics (ISNE)

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“…For Cu 2 SnSe 3 nanocrystals, values of E G between 0.92 and 1.7 eV have been reported [19][20][21][22][23]. It has been suggested [20,22] that the highest E G values observed are due to quantum confinement effects [48,49].…”

Section: Absorption Coefficient Spectrummentioning

confidence: 99%

“…Hence, a comprehensive understanding of its growth, optical, and electrical properties is essential at present since discrepancies still exist in the literature about them. Thus, although it has been established that stoichiometric Cu 2 SnSe 3 crystallizes in a monoclinic structure at low and in a cubic structure at elevated temperatures; much of the bulk materials , films , and nanocrystals crystallize in a cubic or wurtzite structures at room temperature. On the other hand, while first‐principles calculations and ellipsometry studies determine for Cu 2 SnSe 3 a band‐gap energy at room temperature from 0 to 0.45 and 0.49 to 0.68 eV, respectively, a considerable larger value of E G ranging from 0.5 to 1.7 eV was found from absorption spectra .…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, Cu 2 SnSe 3 , especially when it is doped with foreign elements like Mn, In, Ga, and Zn [7][8][9] could be used as a high efficient thermoelectric material. For these reasons, bulk crystals [10][11][12][13], films [14][15][16][17][18], and nanocrystals [19][20][21][22][23] of Cu 2 SnSe 3 have received considerable attention recently. Hence, a comprehensive understanding of its growth, optical, and electrical properties is essential at present since discrepancies still exist in the literature about them.…”

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confidence: 99%

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Optical absorption, Raman spectra, and electrical properties of Mn-doped Cu₂ SnSe₃ semiconductor compound

Rincón

Marcano

Casanova

et al. 2015

Phys. Status Solidi B

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Here we report a study of the absorption spectrum of Mn‐doped bulk crystal samples of Cu2SnSe3 which are also characterized by X‐ray diffraction (XRD), electrical properties, and Raman spectroscopy. From the electrical data it is found that above 145 K the electrical conduction is mainly due to activation in the valence band and below this temperature due to variable‐range‐hopping of Efros–Shklovskii type in the impurity band. Our XRD and Raman data show the presence of SnSe and SnSe2 binary secondary phases in this compound. From the absorption coefficient data at room temperature the fundamental absorption edge is determined to be direct with a band gap energy of EG = (0.41 ± 0.01) eV. An additional indirect band‐to‐band transition above 0.9 eV, probably related to the band gap of SnSe, is observed.

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Polymorphic Metastability in Colloidal Semiconductor Nanocrystals

Tappan

Brutchey

2020

ChemNanoMat

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Metastable polymorphs of inorganic solids often possess material properties not present in the corresponding thermodynamic polymorphs, making them targets for the development of new functional materials. In contrast with isolating metastable bulk materials, syntheses of metastable polymorphs on the nanoscale are aided by fast non‐equilibrium reaction kinetics and the favorable thermodynamic influence of surface energies, giving rise to greater ease of access to metastable high‐temperature polymorphs and, in some cases, new polymorphs that do not exist in the bulk. The syntheses of metastable semiconductor nanocrystals are of interest for their potentially unique optoelectronic and physicochemical properties. However, in many material systems, synthesizing nanocrystalline products away from thermodynamic equilibrium in a predictable manner remains an outstanding challenge. This review outlines direct synthetic methodologies that have been developed to enable control over the nucleation and growth of metastable polymorphs of semiconductor nanocrystals by tailoring reaction conditions, precursor kinetics, ligand and surface effects, and other synthetic levers. The case studies reviewed herein expound on the direct syntheses of metastable ZnSe, Cu2SnSe3, CuInSe2, Ag2Se, and AgInSe2 nanocrystals, and although there remain numerous examples of metastable nanocrystal syntheses outside of these metal chalcogenide systems, the concepts discussed are of general utility to the field of metastable nanocrystal syntheses as a whole. Explicit examples in which new functional properties are afforded by metastable polymorphs of the aforementioned material systems are presented within the context of applications for solar cells, photonics, and optical sensing. Finally, the factors that affect the kinetic persistence of metastable nanocrystalline polymorphs are discussed at length for these material systems.

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Cu2SnSe3 and alloyed (ZnSe)x(Cu2SnSe3)1−x nanocrystals with a metastable zincblende and wurtzite structure

Cited by 21 publications

References 34 publications

Synthesis and selenization of Cu<inf>2</inf>SnSe<inf>3</inf> nanocrystals by a novel solution method

Synthesis and selenization of Cu<inf>2</inf>SnSe<inf>3</inf> nanocrystals by a novel solution method

Optical absorption, Raman spectra, and electrical properties of Mn-doped Cu₂ SnSe₃ semiconductor compound

Polymorphic Metastability in Colloidal Semiconductor Nanocrystals

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Cu2SnSe3 and alloyed (ZnSe)x(Cu2SnSe3)1−x nanocrystals with a metastable zincblende and wurtzite structure

Cited by 21 publications

References 34 publications

Synthesis and selenization of Cu<inf>2</inf>SnSe<inf>3</inf> nanocrystals by a novel solution method

Synthesis and selenization of Cu<inf>2</inf>SnSe<inf>3</inf> nanocrystals by a novel solution method

Optical absorption, Raman spectra, and electrical properties of Mn-doped Cu2 SnSe3 semiconductor compound

Polymorphic Metastability in Colloidal Semiconductor Nanocrystals

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Optical absorption, Raman spectra, and electrical properties of Mn-doped Cu₂ SnSe₃ semiconductor compound