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

Bharadwaj, Sachin S; Shivaraj, B.W.; Murthy, H.N. Narasimha; Krishna, M.; Ganiger, Manjush; Idris, Mohd Idzat; Anawal, Pundaleek; Angadi, Vitthal Sangappa

doi:10.1016/j.matpr.2018.06.478

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…The resistance of the film has been measured as 20 KΩ. This value is similar to the published values [51,52]. For a high-quality transparent conductive oxide thin film, the resistance value should be lower than 1000 Ω.…”

Section: Resultsanddiscussionsupporting

confidence: 84%

Optical and electric characteristics of CuO nanoparticle-doped ZnO thin films using thermionic vacuum arc deposition system

Ozer,

Ozkan,

Pat

2024

J Mater Sci: Mater Electron

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In this study, the thermionic vacuum arc (TVA) method was employed to fabricate thin films of zinc oxide (ZnO) doped with copper oxide nanoparticles (CuONPs). The primary objective was to investigate the influence of the substrate on the characteristics of the CuONPs-doped ZnO thin films. CuONPs were synthesized using both the solution plasma process and the high-voltage liquid plasma generation method, resulting in particle sizes ranging from 20 to 40 nm. The X-ray diffraction (XRD) pattern confirmed the polycrystalline nature of the CuONPs. The prepared CuONPs in powder form were blended with ZnO powder and utilized as an anode material for TVA discharge and coating. The structural, optical, elemental, and topological properties of the resulting thin films were systematically examined. The findings revealed that the deposited thin films exhibited a polycrystalline structure, with transparent and electrically conductive layers. Similar reflection values were observed for films deposited on both glass and indium tin oxide (ITO)-coated glass substrates. Nanostructures on the film surfaces were elucidated through field emission scanning electron microscopy images. The atomic ratios of Cu/Zn were determined as 1/3 and 1/10 for films deposited on uncoated and ITO-coated glass substrates, respectively. The mean grain size of the nanoparticles on the film surface measured approximately 17 nm for films deposited on uncoated glass substrates and 35 nm for those deposited on ITO-coated glass substrates. The film resistance was measured at 20 kΩ, indicating its suitability as a semiconductor. Analysis of the XRD pattern identified peaks corresponding to CuONPs and ZnO in the deposited films, affirming their polycrystalline nature. In conclusion, the deposited thin films exhibit favorable characteristics for semiconductor applications, and the coating method employed proves to be effective in producing high-quality thin films.

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Section: Resultsanddiscussionsupporting

confidence: 84%

Optical and electric characteristics of CuO nanoparticle-doped ZnO thin films using thermionic vacuum arc deposition system

Ozer,

Ozkan,

Pat

2024

J Mater Sci: Mater Electron

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“…The ZnO-based gas sensors have been optimized using several techniques including solvothermal, microwave-induced, wet chemical, sol-gel, hydrothermal, soft chemical, chemical vapour phase, and coprecipitation methods. These techniques incorporate transitional elements such as Co, [9][10][11] Ni, 11 Fe, 12 Cu, 13 Cr, and Mn, 14 as well as precious metals like Au, 15,16 Pd, 17 Ag, 18 Pt, 19 and others. Doping has several advantages as a single charge donor that feeds surplus carriers to the conduction band, such as boosting the conductance and sensitivity of ZnO, reducing the working temperature, minimizing the response time, and improving both selectivity and stability.…”

mentioning

confidence: 99%

Synthesis and Characterization of Flower-Like Cobalt-Doped ZnO Nanostructures for Ammonia Sensing Applications

Himabindu,

Latha Devi,

Nagaraju

et al. 2024

ECS J. Solid State Sci. Technol.

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The present study uses the co-precipitation method to explore the synthesis of zinc oxide and cobalt-doped ZnO sensors, encompassing a range of cobalt concentrations from 1 to 4 wt.%. The synthesized samples undergo comprehensive analysis to evaluate their structural, morphological, optical, and gas-sensing properties. X-ray diffraction revealed a hexagonal Wurtzite structure, and the crystallite size decreased from 16.92 to 15.39 nm. Energy-dispersive X-ray spectroscopy and Fourier-transform infrared spectroscopy collectively affirmed the presence of cobalt. Scanning electron microscopy was used to analyze the morphological characteristics. The Tauc-plot was used to determine the optical bandgap via diffuse reflectance spectroscopy. As cobalt doping increased, the band gap increased from 3.18 to 3.23 eV. Further, atomic force microscopy and Brunauer-Emmett-Teller analysis were used to assess the surface topography and pore size distribution. The AFM measurements indicated roughness within 435-700 nm. The BET analysis revealed mesoporous properties, with surface area ranging between 18.657 to 21.962 m2/g. Subsequently, the gas-sensing capabilities of the Co-doped ZnO sensors were examined for various volatile organic compounds at room temperature. The sensor with 4% Cobalt doping exhibited a fast response and recovery time of 21 and 20 seconds for 2 ppm of NH3

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Effect of dopant oxidation states on enhanced low ppm CO sensing by copper doped zinc oxide

Rudra

Chakraborty

Srihari

et al. 2023

Materials Chemistry and Physics

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

Cited by 5 publications

References 12 publications

Optical and electric characteristics of CuO nanoparticle-doped ZnO thin films using thermionic vacuum arc deposition system

Optical and electric characteristics of CuO nanoparticle-doped ZnO thin films using thermionic vacuum arc deposition system

Synthesis and Characterization of Flower-Like Cobalt-Doped ZnO Nanostructures for Ammonia Sensing Applications

Effect of dopant oxidation states on enhanced low ppm CO sensing by copper doped zinc oxide

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