Physico-Chemical Properties of CuO Thin Films Deposited by Spray Pyrolysis

Boudjema, B.; Daira, R.; Kabir, Abdenour; Djebien, Rafika

doi:10.4028/www.scientific.net/msf.895.33

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…The evolution of the thickness of the films of CuO as a function of spray number is shown in Figure 3. It is noted that the thickness of the films increases with the increase of the spray number, this correlation between the thickness of the films and spray number was also obtained by R.Daira and al and B.Boudjema and al [32,33].…”

Section: Intensity (Arbunits) Raman Shift CM -1supporting

confidence: 73%

Structural, optical and electrical properties of copper oxide thin films deposited by spray pyrolysis

Alouche,

Boudjema,

Daira

et al. 2023

JOR

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In this work, we have developed thin layers of CuO by method of pyrolysis spray. The samples developed are obtained from the use of copper chloride precursor CuCl2 with molarity of 0.1 mol/l and a spray number that varies between 25 to 150 spray with a step of 25 spray to see the effect of this parameter on the structural, optical and electrical properties of our material. The structural characterization of the obtained thin layers was done by X-ray diffraction (XDR) and spectroscopy Raman. The optical characterization was done by UV visible spectroscopy and electrical characterization by four points. The XDR has confirmed the crystalline state of our thin layers and the formation of the CuO with a preferential direction according to the plan (002). The Raman spectroscopy allowed us to confirm the presence of a thin layer based on the CuO. The lattice parameters remain mainly constant. The spectra UV visible of films has given a transmission varies between 80% and 40% in visible. The optical gap determined varies between 1.75 eV and 1.2 eV. Electrical characterization shows that the resistivity varied between 3.21KΩ.cm and 1.7KΩ.cm depending on number of spray for ethanol gas sensing applications.

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Section: Intensity (Arbunits) Raman Shift CM -1supporting

confidence: 73%

Structural, optical and electrical properties of copper oxide thin films deposited by spray pyrolysis

Alouche,

Boudjema,

Daira

et al. 2023

JOR

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“…There is a wide variety of techniques for developing thin CuO films. Examples include cathodic [10], sol gel method [11], laser ablation [12], thermal evaporation [13] and pyrolysis spray [14,15].The latter was used for the development of our thin films of copper oxide that we subsequently annealed at high temperature.This technique has a definite interest; it is a simple technique and makes it possible to produce materials of a very high purity.…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and electrical properties of CuO thin films deposited by spray pyrolysis technique: influence annealing process

Daira¹,

Boudjema²,

Mohammedi³

2023

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In this work, CuO thin films about the synthesis of the thin films are prepared on glass substrate using spray pyrolysis technique at room temperature different annealing times in temperature 450 0 C.In order to study the effect of annealing times onthe structural, optical and electrical properties.XRD analysis has shown that films with a polycrystalline structurehave a(Monoclinic) structure.In addition, the crystallite phase CuO increases with increasing of annealing temperature.Moreover, with a preferred orientation along (002) peak.The optical properties confirmed that the elaborated films have a transmittance of 70%. We have found that the band gap energy (Eg) is a decreasing function with respect to the annealing temperature time. In addition, the electrical resistivity varies from 18.97 to 4.58 KOhm.cm for the films grown at different annealing times.

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“…There are various synthesis methods to achieve nanoscale size; the difference between them lies in controlling the shape, size and other properties of the prepared nanostructured material. Several methods of preparation and/or deposition are well known, in particular sol gel, thermal evaporation, hydrothermal methods, plasma torch processing and chemical spray pyrolysis (CSP) [13][14][15]. In addition to the classical methods, other techniques exist, such as chemical vapour deposition (CVD), pulsed laser deposition (PLD), sputtering by magnetron (classic or pulsed) and electrochemistry.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous studies, we investigated the influence of the annealing process on the physico-chemical properties of CuO thin films grown via CSP. Several types of precursors (0.1 M) have been studied, such as copper chloride or copper acetate dissolved in an appropriate volume of water [14,15]. A decrease of the band gap energy was observed, shown to be related to increasing crystallite size and finally explained by the quantum confinement effect.…”

Section: Introductionmentioning

confidence: 99%

Influence of Al Doping on the Physical Properties of CuO Thin Films

et al. 2023

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The synthesis of cupric oxide (CuO) films on cost-efficient, optical grade borosilicate-crown glass substrates (BK7) via chemical spray pyrolysis (CSP), either in pure form or with a low concentration of Al doping (below 1%), is presented and discussed. As a non-toxic p-type semiconductor, exhibiting monoclinic crystal structure and widely tuneable band gap (Eg), it is used in various applications. The optical properties, morphology and crystalline phases of CuO films are influenced by substrate temperature during thin film growth (annealing) and also by chemical doping very often introduced to modify grain boundary energy. The importance of our research subject is therefore perfectly justified and is essentially based on the fact that the potential fields of application are wide. Thus, herein we emphasize impact of the annealing stage and Al doping upon the structural, optical and electrical properties of the resulting product. Raman spectroscopy analysis confirms the presence of vibrational bands characteristic of a CuO phase, while X-ray diffraction (XRD) confirms the polycrystalline nature of the pure films. The thickness of the CuO films grown at 350 °C over three annealing intervals is proportional to the annealing time, while the crystallite phase in the films is proportional with the annealing temperature. Furthermore, XRD analysis of the Al:CuO films indicates the formation of a monoclinic-type structure (CuO phase) exhibiting a preferred orientation along the (002) plane, together with a significant grain size reduction from ~88 to ~45 nm as Al content increases. The transmittance spectra (between 400 and 800 nm) reveal a decrease in the transmittance from 48% to 15% with as the Al doping ratio increases. Additionally, the bandgap energy of the films is measured, modelled and discussed, using data from an ultraviolet–visible (UV-Vis) spectrophotometer. The calculated Eg is approximately 3.5 eV, which decreases with respect to the increasing annealing temperature, while the electrical resistivity varies from ~19 to ~4.6 kOhm.cm. Finally, perspectives and applications of CuO films are suggested, since the films are found to have a remarkable improvement in their structure and optical properties when doped with Al.

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Physico-Chemical Properties of CuO Thin Films Deposited by Spray Pyrolysis

Cited by 6 publications

References 17 publications

Structural, optical and electrical properties of copper oxide thin films deposited by spray pyrolysis

Structural, optical and electrical properties of copper oxide thin films deposited by spray pyrolysis

Structural, optical and electrical properties of CuO thin films deposited by spray pyrolysis technique: influence annealing process

Influence of Al Doping on the Physical Properties of CuO Thin Films

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