Influence of annealing temperature on the structural, morphological and optical properties of Cu doped ZnO thin films deposited by the sol–gel method

Saidani, T.; Zaabat, Mourad; Aida, M. S.; Benaboud, A.; Benzitouni, Sarah; Boudine, A

doi:10.1016/j.spmi.2014.07.015

Cited by 34 publications

(12 citation statements)

References 25 publications

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“…Owing to the low cost, easy installation, high sensitivity, quick response and reliability electronic thin film gas sensors have gained ground in present world scenario [1]. When materials are analyzed in the form of thin films their properties change to a large extent [2]. Thin film technology makes use of the fact that by varying the thickness various properties of materials can be changed.…”

Section: Introductionmentioning

confidence: 99%

“…XRD studies showed that the slight difference in the lattice parameters of Copper doped ZnO was because of Copper atoms occupy various positions in the lattice which then form the defects. Tarek Saidani et al [11] doped 5 % Copper into ZnO and dip coating technique was used for making films and deposited on glass substrates. Effect of post heating on various properties of films such as the structural, morphological and optical properties was studied.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Copper Doped Zinc Oxide Thin Films for CO Gas Sensing

Bharadwaj¹,

Shivaraj²,

Murthy³

et al. 2018

Materials Today: Proceedings

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Objective of this work was to synthesize Copper doped Zinc Oxide (CZO) films and optimization of process parameters by varying molarity of zinc acetate dehydrate from 0.5 M to 1.0 M, concentration of copper acetate monohydrate from 1% to 5 % and annealing temperature from 200 ºC to 300 ºC to measure the sensitivity of CZO films for CO (Carbon Monoxide) gas. The concentration of CO gas was maintained at 5 ppm and operating temperature of 250 ºC was used for sensing. Analysis for sensitivity showed highest grading for parametric combination of 0.75 molarity, 3% copper concentration and 300 ºC annealing temperature with surface roughness of 3.90 nm and grain size of 256 nm. TEM image revealed the crystalline grain size was 5 nm. ANOVA showed that annealing temperature influenced the sensitivity by 69.06 % .

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Copper Doped Zinc Oxide Thin Films for CO Gas Sensing

Bharadwaj¹,

Shivaraj²,

Murthy³

et al. 2018

Materials Today: Proceedings

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“…Optical band gap of the sample decreases firstly and then increases with the increase of Cu doping in the Na-doped ZnO. Saidani et al [36] considered that reduction of the optical band gap of Cu-doped ZnO thin films was mainly due to the increase of the grain size. Jongnavakit et al [22] reported that the optical band gap of Cu-doped ZnO thin film increases with increasing the Cu doping.…”

Section: Resultsmentioning

confidence: 99%

Microstructure, surface morphology and optical properties of Na x Cu y Zn1−x−y O thin films

Zhao

et al. 2015

J Mater Sci: Mater Electron

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Na x Cu y Zn 1-x-y O thin films were prepared by sol-gel method on quartz glass. The effect of Na (or Cu) doping on the microstructure, surface morphology, optical properties of the thin films was investigated. The Na 0.1 Cu 0.01 Zn 0.89 O thin film has the largest average grain size and the best preferential c-axis orientation, which may be attributed to the difference in ionic radius between Zn and Na (or Cu). The Na 0.1 Cu 0.01 Zn 0.89 O thin film also presents denser morphology with little voids and the smallest optical band gap, which may be attributed to band edge bending and the larger grain size. The largest intensity of A 1 (LO) modes may be due to the major structural defect concentrations. The quenching of UV and visible emissions, which may be attributed to the increase of non-radiative recombination transition, has been observed in the Na 0.1 Cu 0.01 Zn 0.89 O and Na 0.1-Cu 0.02 Zn 0.88 O thin films.

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“…The enormous attention in the last decades has been devoted to porous silicon (PSi) that was investigated for variety In addition, the ZnO NC structures are interesting for phosphor applications owing to the excellent emission in orange, yellow, green, and blue ranges of PL spectra. The high concentration of radiative defects obtained in ZnO NC films permits to expect a wide spectrum of luminescence bands that is important for "white" light emitting structures [11][12][13][14]. However, the relations between the defects and structural properties of ZnO NCs (nanosheets, nanorods, etc.)…”

Section: Introductionmentioning

confidence: 99%

Emission, Defects, and Structure of ZnO Nanocrystal Films Obtained by Electrochemical Method

Torchynska¹,

Filali²

2017

Thin Film Processes - Artifacts on Surface Phenomena and Technological Facets

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ZnO nanocrystal (NC) films, prepared by electrochemical etching with varying the technological routines, have been studied by means of photoluminescence (PL), scanning electronic microscopy (SEM), energy dispersion spectroscopy (EDS), Raman scattering, and X ray diffraction (XRD) techniques. Raman and XRD studies have confirmed that annealing stimulates the ZnO oxidation and crystallization with the formation of wurtzite ZnO NCs. The ZnO NC size decreases from 250-300 nm down to 40-60 nm with increasing the etching time. Two PL bands connected with the near-band edge (NBE) and defect-related emissions have been detected. Their intensity stimulation with NC size decreasing has been detected. The NBE emission enhancement is attributed to the week quantum confinement and exciton-light coupling with polariton formation in small ZnO NCs. The luminescence, morphology, and crystal structure of ZnO:Cu NCs versus Cu concentration have been investigated as well. The types of Cu-related complexes are discussed using the correlation between the PL spectrum transformations and XRD parameters. It is shown that the plasmon generation in Cu nanoparticles leads to the surface enhanced Raman scattering (SERS) effect and to PL intensity increasing the defect-related PL bands. The comparison of ZnO and ZnO:Cu NC emissions has been done and discussed.

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Influence of annealing temperature on the structural, morphological and optical properties of Cu doped ZnO thin films deposited by the sol–gel method

Cited by 34 publications

References 25 publications

Synthesis and Characterization of Copper Doped Zinc Oxide Thin Films for CO Gas Sensing

Synthesis and Characterization of Copper Doped Zinc Oxide Thin Films for CO Gas Sensing

Microstructure, surface morphology and optical properties of Na x Cu y Zn1−x−y O thin films

Emission, Defects, and Structure of ZnO Nanocrystal Films Obtained by Electrochemical Method

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