Influence of yttrium doping on the structural, morphological and optical properties of nanostructured ZnO thin films grown by spray pyrolysis

Bazta, O.; Urbieta, A.; Piqueras, J.; Fernández, Paloma; Addou, M.; Calvino, José J.; Hungría, Ana B.

doi:10.1016/j.ceramint.2018.12.178

Cited by 42 publications

(22 citation statements)

References 67 publications

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“…Yttrium (Y) is an environmentally-friendly and abundant rare earth (RE) element [21]. The radius of yttrium is close to the atomic radius of zinc (Zn), which facilitates the insertion of Y ions into the ZnO lattice [22]. So far, some studies on Y-doped ZnO have shown that impurity levels could be introduced in the forbidden band by Y doping, and the valence electron transition with low-energy excitation could improve the utilization of visible light [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

First-Principles Calculations of the Electronic Structure and Optical Properties of Yttrium-Doped ZnO Monolayer with Vacancy

Wang

Liu

et al. 2020

Materials

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The electronic structures and optical characteristics of yttrium (Y)-doped ZnO monolayers (MLs) with vacancy (zinc vacancy, oxygen vacancy) were investigated by the first-principles density functional theory. Calculations were performed with the GGA+U (generalized gradient approximation plus U) approach, which can accurately estimate the energy of strong correlation semiconductors. The results show that the formation energy values of Y-doped ZnO MLs with zinc or oxygen vacancy (VZn, VO) are positive, implying that the systems are unstable. The bandgap of Y-VZn-ZnO was 3.23 eV, whereas that of Y-VO-ZnO was 2.24 eV, which are smaller than the bandgaps of pure ZnO ML and Y-doped ZnO MLs with or without VO. Impurity levels appeared in the forbidden band of ZnO MLs with Y and vacancy. Furthermore, Y-VZn-ZnO will result in a red-shift of the absorption edge. Compared with the pure ZnO ML, ZnO MLs with one defect (Y, VZn or VO), and Y-VZn-ZnO, the absorption coefficient of Y-VO-ZnO was significantly enhanced in the visible light region. These findings demonstrate that Y-VO-ZnO would have great application potential in photocatalysis.

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Section: Introductionmentioning

confidence: 99%

First-Principles Calculations of the Electronic Structure and Optical Properties of Yttrium-Doped ZnO Monolayer with Vacancy

Wang

Liu

et al. 2020

Materials

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“…A prominent peak corresponding to (002) plane has been observed for all of our samples. No additional peaks due to segregated yttrium-rich phases have been found in any of the films under test, thus indicating their high phase homogeneity [7]. This also indicates that Y ions are uniformly substituted into either Zn sites or interstitial sites in the ZnO lattice.…”

Section: Resultsmentioning

confidence: 82%

“…Transparent conductive ZnO-based oxides are mainly obtained by doping with group-III elements such as In, Al, and Ga [2]. In spite of great potential practical and fundamental interest, the number of publications that deal with the properties of yttrium-doped zinc oxide films still remains insufficient [3][4][5][6][7]. For optimal application of ZnO:Y films, it is necessary to have indepth knowledge of their structure and optical and electrical properties.…”

Section: Effect Of Dopant Concentration and Crystalline Structure On The Absorption Edge In Zno:y Films 1 Introductionmentioning

confidence: 99%

Effect of dopant concentration and crystalline structure on the absorption edge in ZnO:Y films

Turko¹,

Mostovoy²,

Kovalenko³

et al. 2021

Ukr. J. Phys. Opt.

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We study the crystalline structure and absorption spectra for the zinc oxide films with different levels of yttrium doping. The films are deposited on glass substrates, using radio-frequency magnetron sputtering. We estimate the concentration of free charge carriers and show that the 'blue' shift of the fundamental absorption edge in ZnO:Y films with increasing doping level (up to 4.7 wt. %) is explained by Burstein-Moss effect. At higher concentrations of yttrium, behaviour of the fundamental absorption edge is described by a known empirical Urbach rule.

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“…Translucent oxides such as CuO, SnO 2 , and ZnO have invaded photovoltaic and detecting systems industrial sectors [1,2]. The inherited high excitation binding energy of ZnO [3], physical and chemical stability [4]. Based on these observed outstanding properties, ZnO has been widely used in the fabrication of photodetectors, reminiscence uses, LED,…”

Section: Introductionmentioning

confidence: 99%

Optical, Structural, and Crystal Defects Characterizations of Dip Synthesized (Fe-Ni) Co-Doped ZnO Thin Films

et al. 2020

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Sol-gel technique is used to synthesize as-grown zinc oxide (ZnO) and iron-nickel (Fe-Ni) co-doped ZnO thin films deposited on glass substrates using dip coating technique. The structural properties and crystal imperfections of as-prepared thin films are investigated. We performed the structural analysis of films using X-ray diffraction (XRD). The XRD analysis reveal that the as-prepared films exhibit wurtzite structure. Furthermore, XRD-line profile analysis is performed to study the correlation between structural properties and imperfections of the nanocomposite thin films. The crystallite size and microstrains parameters are predicted using the Williamson–Hall method. We found that the crystallites size increases as the co-doped (Fe-Ni) concentration is increased. However, microstrains of the nanocomposite films decreases as (Fe-Ni) concentration is increased. The optical properties of the (Fe-Ni) co-doped nanocomposite films are investigated by performing UV-Vis (250 nm–700 nm) spectrophotometer measurements. We found that as the (Fe-Ni) concentration level is steadily increased, transmittance of the undoped ZnO thin films is decreased. Remarkably, refractive index of undoped ZnO thin films is found to exhibit values extending from 1.55 to1.88 that would increase as (Fe-Ni) concentration is increased.

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Influence of yttrium doping on the structural, morphological and optical properties of nanostructured ZnO thin films grown by spray pyrolysis

Abstract: Influence of yttrium doping on the structural, morphological and optical properties of nanostructured ZnO thin films grown by spray pyrolysis, Ceramics International,

Cited by 42 publications

References 67 publications

First-Principles Calculations of the Electronic Structure and Optical Properties of Yttrium-Doped ZnO Monolayer with Vacancy

First-Principles Calculations of the Electronic Structure and Optical Properties of Yttrium-Doped ZnO Monolayer with Vacancy

Effect of dopant concentration and crystalline structure on the absorption edge in ZnO:Y films

Optical, Structural, and Crystal Defects Characterizations of Dip Synthesized (Fe-Ni) Co-Doped ZnO Thin Films

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