Impact of sequential annealing on the characteristics of thermally evaporated semiconductor Cu2Se/ZnSe/Cu2Se sandwich structure

Nelson, P. Issac; Kannan, R.; Mohan, A.; Rajesh, S.; Vidhya, B.

doi:10.1007/s10854-018-8730-z

Cited by 10 publications

(6 citation statements)

References 36 publications

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“…The semiconducting nature of monoclinic β-Cu 2−x Se was estimated via experimentally obtained bandgap values. The bandgap value, calculated from the Tauc plot, also agrees with the reported data in previous works [ 58 , 59 ].…”

Section: Resultssupporting

confidence: 90%

Chemical-Vapor-Deposition-Synthesized Two-Dimensional Non-Stoichiometric Copper Selenide (β-Cu2−xSe) for Ultra-Fast Tetracycline Hydrochloride Degradation under Solar Light

Srijith,

Konar,

Teblum

et al. 2024

Molecules

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The high concentration of antibiotics in aquatic environments is a serious environmental issue. In response, researchers have explored photocatalytic degradation as a potential solution. Through chemical vapor deposition (CVD), we synthesized copper selenide (β-Cu2−xSe) and found it an effective catalyst for degrading tetracycline hydrochloride (TC-HCl). The catalyst demonstrated an impressive degradation efficiency of approximately 98% and a reaction rate constant of 3.14 × 10−2 min−1. Its layered structure, which exposes reactive sites, contributes to excellent stability, interfacial charge transfer efficiency, and visible light absorption capacity. Our investigations confirmed that the principal active species produced by the catalyst comprises O2− radicals, which we verified through trapping experiments and electron paramagnetic resonance (EPR). We also verified the TC-HCl degradation mechanism using high-performance liquid chromatography–mass spectrometry (LC-MS). Our results provide valuable insights into developing the β-Cu2−xSe catalyst using CVD and its potential applications in environmental remediation.

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Section: Resultssupporting

confidence: 90%

Chemical-Vapor-Deposition-Synthesized Two-Dimensional Non-Stoichiometric Copper Selenide (β-Cu2−xSe) for Ultra-Fast Tetracycline Hydrochloride Degradation under Solar Light

Srijith,

Konar,

Teblum

et al. 2024

Molecules

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“…[54] Therefore the prominent peak in the present sample at 210 cm À 1 can be assigned to the transverse optical phonon mode of ZnSe. [55] The small peak that arises at 130 cm À 1 in the present sample can be assigned to the second transverse acoustic (2TA) phonon mode of ZnSe, which arises at 138 cm À 1 as reported. [56][57][58] The vibrational bands found in the Raman spectra are matched with the XRD phases.…”

Section: Structural Analysis: Xrd Ftir and Ramansupporting

confidence: 74%

“…have reported the Raman peak at 205 cm −1 as the transverse optical (TO) phonon mode of the ZnSe [54] . Therefore the prominent peak in the present sample at 210 cm −1 can be assigned to the transverse optical phonon mode of ZnSe [55] . The small peak that arises at 130 cm −1 in the present sample can be assigned to the second transverse acoustic (2TA) phonon mode of ZnSe, which arises at 138 cm −1 as reported [56–58] .…”

Section: Resultssupporting

confidence: 47%

Hydrothermal Synthesis of Cu_0.66‐xZn_0.34+xSe Materials and Investigation of Their Structural, Optical, and Magnetic Properties

Parida,

Senapati,

Pradhan

et al. 2023

ChemistrySelect

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In the current paper, we have prepared Cu0.66‐xZn0.34+xSe materials by varying the concentration of copper and zinc (x=0, 0.085, 0.17, 0.255, 0.34) with the help of a facile one‐step hydrothermal method. The X‐ray diffraction study reveals that the as‐prepared nanomaterials show the polycrystalline property. The crystallinity increases with the variation of Zn concentration, and the average crystallite size was calculated in the 39 to 55 nm range. The morphological analysis shows the uniform and agglomerated particles having an average size of around 596 nm. High‐resolution transmission electron microscopy and selected area electron diffraction study reveal the crystalline phases of the prepared sample. The energy‐dispersive X‐ray analysis confirmed the presence of constituent elements in the sample. The sample shows a high optical bandgap in the range of 3.6 eV to 4.09 eV, which was calculated from absorbance spectra. Photoluminescence measurements of the samples were carried out with 532 nm laser excitation, where the defect‐related emission peaks in the 540–850 nm range are observed. A change in the bandgap and optical emission is observed for different compositions. The magnetic properties analysis through the vibrating sample magnetometer reveals that the prepared sample exhibits ferromagnetic behaviour at room temperature, which can be used in magnetic storage applications. The tuning of the optical properties of the samples by varying the copper and zinc concentrations will be useful for various photonic devices.

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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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Impact of sequential annealing on the characteristics of thermally evaporated semiconductor Cu2Se/ZnSe/Cu2Se sandwich structure

Cited by 10 publications

References 36 publications

Chemical-Vapor-Deposition-Synthesized Two-Dimensional Non-Stoichiometric Copper Selenide (β-Cu2−xSe) for Ultra-Fast Tetracycline Hydrochloride Degradation under Solar Light

Chemical-Vapor-Deposition-Synthesized Two-Dimensional Non-Stoichiometric Copper Selenide (β-Cu2−xSe) for Ultra-Fast Tetracycline Hydrochloride Degradation under Solar Light

Hydrothermal Synthesis of Cu_0.66‐xZn_0.34+xSe Materials and Investigation of Their Structural, Optical, and Magnetic Properties

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

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Impact of sequential annealing on the characteristics of thermally evaporated semiconductor Cu2Se/ZnSe/Cu2Se sandwich structure

Cited by 10 publications

References 36 publications

Chemical-Vapor-Deposition-Synthesized Two-Dimensional Non-Stoichiometric Copper Selenide (β-Cu2−xSe) for Ultra-Fast Tetracycline Hydrochloride Degradation under Solar Light

Chemical-Vapor-Deposition-Synthesized Two-Dimensional Non-Stoichiometric Copper Selenide (β-Cu2−xSe) for Ultra-Fast Tetracycline Hydrochloride Degradation under Solar Light

Hydrothermal Synthesis of Cu0.66‐xZn0.34+xSe Materials and Investigation of Their Structural, Optical, and Magnetic Properties

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

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Product

Resources

About

Hydrothermal Synthesis of Cu_0.66‐xZn_0.34+xSe Materials and Investigation of Their Structural, Optical, and Magnetic Properties

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