Structural and optical properties of CdTe-nanocrystals thin films grown by chemical synthesis

Campos‐González, E.; Moure-Flores, F. de; Ramírez-Velázquez, L. E.; Casallas-Moreno, K.; Guillén-Cervantes, A.; Santoyo-Salazar, J.; Contreras‐Puente, G.; Zelaya-Ángel, O.

doi:10.1016/j.mssp.2015.03.005

Cited by 24 publications

(4 citation statements)

References 22 publications

(24 reference statements)

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“…It is noted that Te‐Raman modes are usually detected in CdTe samples, which may originate from the presence of little Te precipitates . This peak position agrees well with the previously reported one but with a little blue shift due to the increase of confinement in the 2D ultrathin structure . And its second‐order (2LO) mode around 340 cm −1 is always associated with the peak of mica substrates, which makes it difficult to be distinctly identified.…”

Section: Comparison Of 2d Cdte Photodetectors With Other Worksupporting

confidence: 92%

“…[35,39] This peak position agrees well with the previously reported one but with a little blue shift due to the increase of confinement in the 2D ultrathin structure. [35,[39][40][41] And its second-order (2LO) mode around 340 cm −1 is always associated with the peak of mica substrates, which makes it difficult to be distinctly identified. The photoluminescence (PL) spectra of CdTe nanosheets, excited by 514 nm, are also used to identify its band structure.…”

Section: D Nanostructuressupporting

confidence: 91%

“…As can be seen, three prominent Raman peaks are observed at 128, 145, and 168 cm −1 , which correspond to the A 1 and E modes of Te, and the longitudinal optical (LO) phonon mode of CdTe, respectively. It is noted that Te‐Raman modes are usually detected in CdTe samples, which may originate from the presence of little Te precipitates . This peak position agrees well with the previously reported one but with a little blue shift due to the increase of confinement in the 2D ultrathin structure .…”

Section: Comparison Of 2d Cdte Photodetectors With Other Worksupporting

confidence: 87%

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Ultrathin Single‐Crystalline CdTe Nanosheets Realized via Van der Waals Epitaxy

et al. 2017

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Due to the novel physical properties, high flexibility, and strong compatibility with Si-based electronic techniques, 2D nonlayered structures have become one of the hottest topics. However, the realization of 2D structures from nonlayered crystals is still a critical challenge, which requires breaking the bulk crystal symmetry and guaranteeing the highly anisotropic crystal growth. CdTe owns a typical wurtzite crystal structure, which hinders the 2D anisotropic growth of hexagonal-symmetry CdTe. Here, for the first time, the 2D anisotropic growth of ultrathin nonlayered CdTe as thin as 4.8 nm via an effective van der Waals epitaxy method is demonstrated. The anisotropic ratio exceeds 10 . Highly crystalline nanosheets with uniform thickness and large lateral dimensions are obtained. The in situ fabricated ultrathin 2D CdTe photodetector shows ultralow dark current (≈100 fA), as well as high detectivity, stable photoswitching, and fast photoresponse speed (τ = 18.4 ms, τ = 14.7 ms). Besides, benefitting from its 2D planar geometry, CdTe nanosheet exhibits high compatibility with flexible substrates and traditional microfabrication techniques, indicating its significant potential in the applications of flexible electronic and optoelectronic devices.

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Section: Comparison Of 2d Cdte Photodetectors With Other Worksupporting

confidence: 92%

Section: D Nanostructuressupporting

confidence: 91%

Section: Comparison Of 2d Cdte Photodetectors With Other Worksupporting

confidence: 87%

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Ultrathin Single‐Crystalline CdTe Nanosheets Realized via Van der Waals Epitaxy

et al. 2017

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“…CdO is a well-known n-type semiconductor with piezoelectric properties and polycrystalline nature 4 , 9 . As a result, cadmium oxide nanoparticles (CdO NPs) are extensively used in various applications, including photovoltaic cells, photodiodes, transparent electrodes, gas sensors, infrared detectors, liquid crystal displays, antireflective coatings, and solar cells 10 – 13 . CdO is an excellent photocatalyst for photocatalytic applications due to its ability to absorb visible light and its high carrier mobility 14 , 15 .…”

Section: Introductionmentioning

confidence: 99%

Effect of the molar ratio of (Ni2+ and Fe3+) on the magnetic, optical and antibacterial properties of ternary metal oxide CdO–NiO–Fe2O3 nanocomposites

Al-Mushki

Ahmed

Abdulwahab

et al. 2023

Sci Rep

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In this work, the effect of the molar ratio of (Ni2+ and Fe3+) on the properties of CdO–NiO–Fe2O3 nanocomposites was investigated. The synthesis of CdO–NiO–Fe2O3 nanocomposites was carried out by self-combustion. XRD, UV–Vis, PL and VSM were used to describe the physical properties of the materials. The results showed significant progress in structural and optical properties supporting antibacterial activity. For all samples, the particle size decreased from 28.96 to 24.95 nm with increasing Ni2+ content and decreasing Fe3+ content, as shown by the XRD pattern, which also shows the crystal structure of cubic CdO, cubic NiO, and cubic γ-Fe2O3 spinel. The Ni2+ and Fe3+ contents in the CdO–NiO–Fe2O3 nanocomposites have also been shown to enhance the ferromagnetic properties. Due to the significant coupling between Fe2O3 and NiO, the coercivity Hc values of the samples increase from 66.4 to 266 Oe. The potential of the nanocomposites for antibacterial activity was investigated against Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa, Escherichia coli, and Moraxella catarrhalis) bacteria. Comparison of P. aeruginosa with E. coli, S. aureus and M. catarrhalis showed that it has a stronger antibacterial activity with a ZOI of 25 mm.

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Thermal evolution of physical properties of vacuum evaporated polycrystalline CdTe thin films for solar cells

Chander

Dhaka

2016

J Mater Sci: Mater Electron

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Structural and optical properties of CdTe-nanocrystals thin films grown by chemical synthesis

Cited by 24 publications

References 22 publications

Ultrathin Single‐Crystalline CdTe Nanosheets Realized via Van der Waals Epitaxy

Ultrathin Single‐Crystalline CdTe Nanosheets Realized via Van der Waals Epitaxy

Effect of the molar ratio of (Ni2+ and Fe3+) on the magnetic, optical and antibacterial properties of ternary metal oxide CdO–NiO–Fe2O3 nanocomposites

Thermal evolution of physical properties of vacuum evaporated polycrystalline CdTe thin films for solar cells

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