Structure Properties of As-synthesized Cu-doped ZnO Nanopowder Synthesized by Co-precipitation Method

Thaweesaeng, N.; Supankit, Sineenart; Techidheera, W.; Pecharapa, Wisanu

doi:10.1016/j.egypro.2013.06.800

Cited by 42 publications

(10 citation statements)

References 6 publications

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“…The peaks at 330, 380 and 578 cm −1 can be attributed to E 2 (high)-E 2 (low), A1(TO) and A1(LO) modes, respectively. The peak at 436 cm −1 can be attributed to Raman active modes of E 2 (high), which represents the wurtzite hexagonal structure of ZnO [31,32]. This is in accordance with the XRD pattern of pristine ZnO.…”

Section: Methodssupporting

confidence: 83%

Unusual photoluminescence of Cu–ZnO and its correlation with photocatalytic reduction of Cr(VI)

et al. 2017

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Cu-ZnO was synthesized by sol-gel route with a varied copper concentration of 1, 2 and 3 mol%. The synthesized materials were structurally characterized with powder X-ray diffraction and Raman spectroscopy, morphologically using a field emission scanning electron microscope, and electronic properties were studied with UV-visible spectroscopy and photoluminescence spectroscopy. Variation in Cu doping showed enhancement/quenching in photoluminescence of ZnO. This special characteristic is reflected in photocatalytic reduction of Cr(VI).

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Section: Methodssupporting

confidence: 83%

Unusual photoluminescence of Cu–ZnO and its correlation with photocatalytic reduction of Cr(VI)

et al. 2017

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“…Both A 1 and E 1 modes are Raman and IR active modes. The E 2 mode is a non-polar phonon and active with Raman only, meanwhile B 1 mode is Raman and IR inactive mode [26]. The Raman line of the E 2 (high) mode becomes broad and weaker, which means that the wurtzite crystalline structure of ZnO is weakened by high Cu doping.…”

Section: Raman Spectramentioning

confidence: 98%

Structural and optical characterization of Zn0.95−xMg0.05CuxO nanoparticles

Mallika

Reddy

2015

J Mater Sci: Mater Electron

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In the present paper, Mg and Cu co-doped ZnO nanoparticles (Zn 0.95-x Mg 0.05 Cu x O) synthesized using SolGel method and their structural, optical properties were studied. Hexagonal wurtzite structure of ZnO was confirmed from XRD results. With Cu doping CuO related phase was formed without altering the crystal structure. The average crystallite size of ZnO decreased with increase of Mg and Cu co-doping. TEM results confirmed the nano size crystalline nature of ZnO nanoparticles. From FE-SEM micrographs, the particle sizes decreased and the morphology became less hexagonal with increase of Cu concentrations along with Mg in ZnO. The weaker and broadened E 2 (high) mode in Raman with increase of Cu doping concentrations may be attributed to wurtzite crystalline structure of ZnO is weakened. Thus, resulting to reduction of the growth induced strains which in good agreement with XRD results. From UV-Vis analysis, fundamental exciton absorption is observed at 377 nm for undoped ZnO. With addition of the dopants (Mg, Cu) the peak got blue shifted from 377 to 355 nm. The blueshift was attributed to the strains produced with dopants but not due to quantum confinement effect due to the sizes of the particles are not comparable of the Bohr atomic radius.

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“…Where I ph is the photocurrent, I dark is the dark current and P opt is the optical power of the UV source, c, e and  are represented blank constant, light speed, electron charge and wavelength used, respectively. According to the relations (5)(6)(7)(8), the results can be found in Table3, at a wavelength of 365, 385 nm is as a function applied voltage.…”

Section: Characteristic Of the Uv Detectormentioning

confidence: 99%

“…Different doping in ZnO (i.e., Mg) can adjust bandgap to make UV photodetectors in different UV region. There were several reports focused on efforts to control the properties of ZnO by adding the transition metal impurities such as Al [3,4], Cu [5], Co [6], In [7], and Mg [3,8] Doping work to control and adjust the band gap, which greatly contribute to increase the efficiency and power, and in many applications, such as Light-emitting diodes [9], laser diodes [10], solar cells, transparent electrodes, thin film transistors and optical sensors [3,11]. The ZnO sensing mechanism is highly correlated with surface reactions hence; oxygen absorption, grain size, defects, and other parameters have an important effect in controlling the sensing response.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Ultraviolet Photodetector Based on Mg-Doped ZnO Nanorods Films

Hameed

2019

MJS

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Magnesium-doped zinc oxide (ZnO: Mg) nanorods and nanotubes films were prepared by hydrothermal method deposited on glass substrates. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), photoluminescence (PL), and optical absorption spectroscopy (UV) were performed to characterize the prepared films. X-ray diffraction analysis showed a decrease in the lattice parameters of Mg doped ZnO NRs. The Photoluminescence of the undoped and Mg-doped ZnO NRs displayed a near band edge. At 10 V bias, the metal-semiconductor-metal (MSM) ultraviolet (UV) photodetector performance of the Mg-doped ZnO prepared for various Mg concentrations of 0.0, 0.02, and 0.06 was investigated under radiation of 40μW/cm2 at the wavelengths of 365 and 385 nm UV light. The responsivity, detectivity and quantum efficiency of Mg-doped based on MSM detector were 0.118A/W, 1.0579*1012 and 40.05157 under UV of wavelength 365nm respectively.

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Structure Properties of As-synthesized Cu-doped ZnO Nanopowder Synthesized by Co-precipitation Method

Cited by 42 publications

References 6 publications

Unusual photoluminescence of Cu–ZnO and its correlation with photocatalytic reduction of Cr(VI)

Unusual photoluminescence of Cu–ZnO and its correlation with photocatalytic reduction of Cr(VI)

Structural and optical characterization of Zn0.95−xMg0.05CuxO nanoparticles

Enhanced Ultraviolet Photodetector Based on Mg-Doped ZnO Nanorods Films

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