Copper doping effect on the properties in ZnO films deposited by sol–gel

Istrate, Anca-Ionela; Mihalache, Iuliana; Romanițan, Cosmin; Tutunaru, Oana; Gavrıla, Raluca; Dediu, Violeta

doi:10.1007/s10854-020-05144-2

Cited by 9 publications

(6 citation statements)

References 30 publications

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“…The opposite could be observed in Cu doping, where the grain size increased to 51.95 nm. This result is also in agreement with a study by Istrate et al, who found that the addition of Cu increased the grain size of ZnO thin film [26].…”

Section: Bcossupporting

confidence: 93%

“…In contrast, Al with an ionic radius of 0.053 nm is expected to cause a significant alteration in the lattice parameter, owing to the large radius difference. A previous study of Al-and/or Cu-doped ZnO thin film has been conducted [11][12][13][14][18][19][21][22][23][24][25][26][27][28]. However, the investigation focuses on the effect of only one doping (Al or Cu) in the ZnO thin film.…”

Section: ■ Introductionmentioning

confidence: 99%

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Influence of Al and Cu Doping on the Structure, Morphology, and Optical Properties of ZnO Thin Film

Afifah

Tjahjono

Ridhova³

et al. 2023

Indones. J. Chem.

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In this study, ZnO thin films doped with Al (AZO) and Cu (CZO) were fabricated on a glass substrate via sol-gel spin coating. The influence of 1 atomic % Al and Cu doping on the structure, morphology, as well as optical properties of ZnO thin film was then analyzed with X-ray diffraction (XRD), atomic force microscopy (AFM), and UV-Vis spectroscopy. XRD analysis revealed that all samples possessed hexagonal wurtzite crystal structures with 3 to 4 preferred orientations. Al and Cu doping caused a decrease in crystal size, while the lattice strain (e) and dislocation density (ρ) were increased. AFM indicated that Al and Cu doping reduced the surface roughness of the ZnO thin film. Optical measurement showed that all samples exhibited high transmittance (> 80%) in the visible light region. Transmittance was reduced after doping, while the band gaps for ZnO, AZO, and CZO thin films are 3.26, 3.28, and 3.23 eV. This study showed that an addition of 1 atomic % transition metal (Al and Cu) greatly influences the structure, morphology, and optical properties of ZnO thin film.

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Section: Bcossupporting

confidence: 93%

Section: ■ Introductionmentioning

confidence: 99%

Influence of Al and Cu Doping on the Structure, Morphology, and Optical Properties of ZnO Thin Film

Afifah

Tjahjono

Ridhova³

et al. 2023

Indones. J. Chem.

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“…This may be due to the displacement of copper atoms by zinc in the hexagonal lattice, the separation of copper into the non-crystalline region at the grain boundaries. Average crystallite size increased with the increasing of Cu concentration in the host ZnO, and it could be attributed to heterogeneous crystal growth at low supersaturation and crystals could grow faster than they nucleate, which result in a larger crystal size distribution (Istrate et al, 2021). c/a value of 1.48 was smaller than ideal c/a value of 1.63 due to the substitution of Cu into ZnO which indicated the electronegativity difference between Zn and Cu (Labhane et al, 2015).…”

Section: Structural Propertiesmentioning

confidence: 98%

Determination of Structural and Optical Properties of Zn1-xCuxO Nanoparticles by Chemical Bath Deposition Waste Recovery Technique

Yakar

2023

Journal of Advanced Research in Natural and Applied Sciences

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In this work, Zn1-xCuxO nanoparticles (x= 0.025, x=0.050, and x=0.075) were synthesized by co-precipitation technique using chemical bath deposition wastes of Cu:ZnO thin films. The XRD evaluation showed that the well-crystalline hexagonal wurtzite ZnO indexed peaks. Average crystallite sizes were found to be around 35.6-42.9 nm range by using the Debye-Scherrer equation. Surface morphology results showed that dense layer of nano-roses and fewer nanorods formations in low Cu-concentrated (x=0.025 and x=0.050) samples. The optical absorption edge shifted slightly to the higher wavelength from 350 nm to 375 nm with decreasing copper concentration, as mentioned the blue shift. Blue shift might be caused an increase in the optical band gap from 3.14 eV to 3.28 eV due to the decrease in Cu concentration.

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“…When pure semiconductor capabilities are insufficient to meet the demands of the desired applications, one of the most effective approaches to improve semiconductor performance is doping with appropriate elements. ZnO has been doped with aluminium [ 8 ], gallium [ 9 , 10 ], cadmium [ 11 ], copper [ 12 ], and other materials to optimise its optical, electrical, and physical properties. In the literature, Indeed, various publications have proposed chemoresistive sensors based on WO 3 [ 13 ], SnO 2 [ 14 ], Co 3 O 4 [ 15 ], and ZnO [ 16 ] that have been investigated for the detection of VOCs.…”

Section: Introductionmentioning

confidence: 99%

A nanostructured Al-doped ZnO as an ultra-sensitive room-temperature ammonia gas sensor

Bantikatla

Devi

Nagaraju³

et al. 2023

J Mater Sci: Mater Electron

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Novel chemi-resistive gas sensors with strong detection capabilities operating at room temperature are desirable owing to their extended cycle life, high stability, and low power consumption. The current study focuses on detecting NH 3 at room temperature using lower gas concentrations. The co-precipitation technique was employed to produce pure and Al-doped ZnO nanoparticles, which were calcined at 300 °C for three hours. The effect of aluminium (Al) doping on the structural, morphological, optical, and gas-sensing abilities was investigated and reported. The presence of aluminium was confirmed by XRD, EDX, and FTIR spectroscopy. Additionally, to assess the various characteristics of Al-doped ZnO nanoparticles, scanning electron microscopy (SEM), ultraviolet–visible diffuse reflectance spectroscopy (UV-DRS), atomic force microscopy (AFM), and Brunauer–Emmett–Teller (BET) techniques were used. The crystallite size increased from 14.82 to 17.49 nm in the XRD analysis; the SEM pictures showed a flower-like morphology; and the energy gap decreased from 3.240 to 3.210 eV when Al doping was raised from 1 wt% to 4 wt%. AFM studies revealed topographical information with significant roughness in the range of 230–43 nm. BET analysis showed a mesoporous nature with surface areas varying from 25.274 to 14.755 m 2 /g and pore diameters ranging from 8.34 to 7.00 nm. The sensing capacities of pure and Al-doped ZnO nanoparticles towards methanol (CH 3 OH), toluene (C 7 H 8 ), ethanol (C 2 H 5 OH), and ammonia (NH 3 ) were investigated at room temperature. The one-wt% Al-doped ZnO sensor demonstrated an ultrafast response and recovery times at one ppm compared to other AZO-based sensors towards NH 3 .

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Copper doping effect on the properties in ZnO films deposited by sol–gel

Cited by 9 publications

References 30 publications

Influence of Al and Cu Doping on the Structure, Morphology, and Optical Properties of ZnO Thin Film

Influence of Al and Cu Doping on the Structure, Morphology, and Optical Properties of ZnO Thin Film

Determination of Structural and Optical Properties of Zn1-xCuxO Nanoparticles by Chemical Bath Deposition Waste Recovery Technique

A nanostructured Al-doped ZnO as an ultra-sensitive room-temperature ammonia gas sensor

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