A simple chemical route to synthesize the umangite phase of copper selenide (Cu<sub>3</sub>Se<sub>2</sub>) thin film at room temperature

Palve, Balasaheb M.; Jadkar, Sandesh; Pathan, Habib M.

doi:10.1088/1674-4926/38/6/063003

Cited by 14 publications

(3 citation statements)

References 39 publications

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“…Both the WZ and ZB spectra have a major peak at ∼260 cm –1 and one less intense peak at ∼193 cm –1 . In previous research, for Cu 3 Se 2 and Cu 2 Se reference spectra, , the major peak occurs at ∼260 cm –1 , with a less intense peak at ∼190 cm –1 . ZnSe reference spectra − have been reported with two major peaks at ∼200 cm –1 (the less intense longitudinal optical phonon mode, LO –1 ) and ∼260 cm –1 (the transverse optical phonon mode, TO).…”

Section: Resultsmentioning

confidence: 72%

Synthesis and Characterization of CuZnSe₂ Nanocrystals in Wurtzite, Zinc Blende, and Core–Shell Polytypes

Ren

Wang

et al. 2019

Chem. Mater.

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CuZnSe2 (CZSe) is an important ternary semiconductor comprised of earth-abundant elements with a suitable bandgap for visible light absorption and structural/stoichiometric versatility that make it a promising candidate for photovoltaic applications. Here we report the controlled synthesis of the compound copper chalcogenide in nanocrystal form using a colloidal hot injection approach. Furthermore, we demonstrate control over the crystal phase to occur as either wurtzite (WZ) or zinc blende (ZB) as a function of the presence and absence of phosphine-based ligands. A major emission peak was observed at ∼1.7 eV using low-temperature photoluminescence (PL), ranging from 30 to 200 K. Additionally, we demonstrate the ability to extend this synthetic protocol to form a polytype structure comprised of a ZB core with a WZ shell.

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Section: Resultsmentioning

confidence: 72%

Synthesis and Characterization of CuZnSe₂ Nanocrystals in Wurtzite, Zinc Blende, and Core–Shell Polytypes

Ren

Wang

et al. 2019

Chem. Mater.

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“…This includes cubic, hexagonal, orthorhombic, monoclinic and tetragonal. Their formation depend upon method of preparation [6,7] and growth conditions. Reports have shown that CuSe mostly possessed hexagonal structural phase at room temperature and go through phase transition to orthorhombic at 48 °C and back to hexagonal phase at 120 °C.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Optical, Structural, Morphological and Electrical Properties of Electrodeposited Cobalt Doped Copper Selenide (Cu_(1-x) Co_x Se) Thin Films

Okoli¹,

Ezenwaka²,

Okereke³

et al. 2022

Trends Sci

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Undoped and cobalt doped copper selenide thin films have been successfully prepared unto fluorine tin oxide (FTO) substrates by electrodeposition method using copper acetate, cobalt nitrate and selenium (IV) oxide as precursors for copper, cobalt and selenium ions respectively. Deposited thin films were subjected to optical, structural, morphological, compositional and electrical analysis using spectrophotometer, x-ray diffractometer, scanning electron microscope (SEM), energy dispersive x-ray spectroscopy (EDS) and 4-point probe. Optical results observed between the wavelength range of 300 nm and 1,000 nm showed that the films have good optical responses. Absorbance values ranged between 0.1 and 0.81 while transmittance lies between 15.59 and 78.68 %. Energy band gap of the films was found to vary from 2.10 to 2.28 eV. These results showed that cobalt as a dopant could be used to modify properties of copper selenide thin films. Structural analysis showed that the deposited films are polycrystalline in nature with hexagonal structural phase. Crystallite sizes of range 27.56 to 34.27 nm were obtained while dislocation density lied between and . Microstrain ranged between and . Micrograph images showed flake-like particles that increased in size as percentage of cobalt increased. Energy dispersive spectroscope (EDS) results confirmed the incorporation of cobalt on the deposited copper selenide films. Electrical resistivity of the films increased from to while conductivity decreased from to as a result of variation in cobalt ion concentration. These properties of the deposited thin films positioned them for solar cell and optoelectronics device applications. HIGHLIGHTS Energy band gap of electrosynthesized cobalt doped copper selenide ranged from 2.10 to 2.28 eV Film thickness values ranged from 48.41 and 176.79 nm. Thickness values of the films were found to increase as concentration of cobalt increase Increase in dopant concentration resulted to shift in diffraction peaks towards larger angles Increase in crystallite size from 27.56 - 34.27 nm was observed as dopant concentration increases SEM images of the films revealed flake - like particles of different sizes GRAPHICAL ABSTRACT

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“…Copper selenide has been studied with great interest during the past decades because of its potential application in the fabrication of photovoltaic devices [4][5][6][7][8]. It has many phases and structural forms: stoichiometric α-Cu2Se, Cu3Se2, CuSe and CuSe2, as well as non-stoichiometric, Cu2-xSe [9], Cu3Se2 [10][11][12], Cu2-xSe [13], CuSe [14] and Cu2Se [15][16]…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline Copper Selenide formation by Direct Reaction between Cu-ions and Selenosulfate

Pathan¹,

Palve²,

Jadkar³

et al. 2020

ES Mater. Manuf.

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In the present paper we successfully synthesized copper selenide nanocrystals on glass substrate by chemical bath deposition technique. We investigate the reaction between Cu-ions and selenosulfate in aqueous solution to form Cu3Se2 at room temperature. The resulting precipitate from the reaction of Cu-ions and selenosulfate which is initially light green (mainly mixture of amorphous Cu2SO3.CuSO3 and Cu(OH)2), turns greenish brown and finally brownish color occurred (mainly copper selenide, confirmed from XRD). The initial precipitate is Cu2SO3.CuSO3 and Cu(OH)2 which gradually reacts with selenosulfate to give mainly Cu3Se2. The Cu3Se2 forms as a disordered phase and Cu(OH)2 reacts with slowly generated Se 2ions to form Cu3Se2 via hydroxide cluster mechanism. The Transmission electron micrograph shows more concentration of small nanocrystal in the range of 2 to 5 nm. The formation mechanism of different phased of copper selenide by chemical bath deposition technique explained in detail.

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A simple chemical route to synthesize the umangite phase of copper selenide (Cu₃Se₂) thin film at room temperature

Cited by 14 publications

References 39 publications

Synthesis and Characterization of CuZnSe₂ Nanocrystals in Wurtzite, Zinc Blende, and Core–Shell Polytypes

Synthesis and Characterization of CuZnSe₂ Nanocrystals in Wurtzite, Zinc Blende, and Core–Shell Polytypes

Investigation of Optical, Structural, Morphological and Electrical Properties of Electrodeposited Cobalt Doped Copper Selenide (Cu_(1-x) Co_x Se) Thin Films

Nanocrystalline Copper Selenide formation by Direct Reaction between Cu-ions and Selenosulfate

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A simple chemical route to synthesize the umangite phase of copper selenide (Cu3Se2) thin film at room temperature

Cited by 14 publications

References 39 publications

Synthesis and Characterization of CuZnSe2 Nanocrystals in Wurtzite, Zinc Blende, and Core–Shell Polytypes

Synthesis and Characterization of CuZnSe2 Nanocrystals in Wurtzite, Zinc Blende, and Core–Shell Polytypes

Investigation of Optical, Structural, Morphological and Electrical Properties of Electrodeposited Cobalt Doped Copper Selenide (Cu_(1-x) Co_x Se) Thin Films

Nanocrystalline Copper Selenide formation by Direct Reaction between Cu-ions and Selenosulfate

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A simple chemical route to synthesize the umangite phase of copper selenide (Cu₃Se₂) thin film at room temperature

Synthesis and Characterization of CuZnSe₂ Nanocrystals in Wurtzite, Zinc Blende, and Core–Shell Polytypes

Synthesis and Characterization of CuZnSe₂ Nanocrystals in Wurtzite, Zinc Blende, and Core–Shell Polytypes