Roughness effect on photoluminescence of cerium doped zinc oxide thin films

Jouad, Mohamed El; Lamrani, M. Alaoui; Sofiani, Z.; Addou, M.; Habbani, T. El; Fellahi, N.; Bahedi, K.; Dghoughi, L.; Monteil, A.; Sahraoui, B.; Dabos, Sylvie; Gaumer, Nathalie

doi:10.1016/j.optmat.2008.10.031

Cited by 38 publications

(11 citation statements)

References 20 publications

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“…Various synthetic approaches have been made to synthesize RE-doped ZnO microstructures such as the hydrothermal route, 19 electrodeposition, 20 rf magnetron, 21 pulsed laser deposition, 22 spray pyrolysis 23 and vapour transport method. 24 Most of these methods are based on expensive equipments, high temperature and vacuum conditions which increase the processing cost of the materials.…”

Section: Introductionmentioning

confidence: 99%

Shape tunable synthesis of Eu- and Sm-doped ZnO microstructures: a morphological evaluation

et al. 2015

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Facile and low-cost aqueous chemical bath deposition route has been demonstrated to fabricate Eu-and Sm-doped ZnO microstructures. The effect of Eu and Sm ions on the morphology of the ZnO was investigated. The synthesized doped ZnO microstructures were systematically characterized by field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman and Fourier transform infrared spectra. FESEM images depicted the formation of Eu-doped ZnO microsphere and Sm-doped ZnO microplates. XRD spectra showed single crystalline nature of the undoped ZnO microdisks, whereas Eu-and Sm-doped ZnO exhibited the polycrystalline nature. The presence of Eu and Sm ions in the ZnO matrix was confirmed by XPS. This means that all the Eu ions substituted Zn 2+ as Eu 2+ into the ZnO matrix, whereas most of Sm ions were being in the trivalent state. This was probably due to the segregation of Sm 2 O 3 species on the surface of ZnO microstructures.

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Section: Introductionmentioning

confidence: 99%

Shape tunable synthesis of Eu- and Sm-doped ZnO microstructures: a morphological evaluation

et al. 2015

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“…The average crystalline size (D) was also estimated by using Scherrer's formula, D= 0.9l/(bÁcosu). 25 The average crystal size of different Ce-doped ZnO samples is listed in Table 1. It was found that the average crystalline size decreased with increase in the cerium amount, indicating that the coexistence of CeO 2 with ZnO may inhibit the growth of ZnO crystallite.…”

Section: Resultsmentioning

confidence: 99%

Influence of Ce doping on structure, morphology, and photocatalytic activity of three-dimensional ZnO superstructures synthesized via coprecipitation and roasting processes

Guo

Cui

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part N:

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Three-dimensional Ce-doped ZnO was synthesized via coprecipitation and roasting processes. The samples were characterized by X-ray diffraction, scanning electron microscopy, specific surface area (Brunauer-Emmett-Teller method), and photoluminescence spectra. Also, the photocatalytic activities of ZnO and Ce-doped ZnO were investigated in ultraviolet light for degradation of methylene blue solution. The results indicated that the concentration of NaOH and the doping amount of Ce showed great influence on morphology, structures, and properties of Ce-doped ZnO. When the (Ce 3+ +Zn 2+)/OH 2 was 1:2.5 and the concentration of Ce was 2 mol%, the morphology of the Ce-doped ZnO was microspheres with superstructures assembled by large amounts of interleaving nanosheets. The morphology transformed from microspheres with superstructures to amorphous by changing the ratio of (Ce 3+ +Zn 2+)/OH 2 from 1:2 to 1:3. The photoluminescence spectra indicated that the recombination rate of photogenerated electron-hole pairs of Ce-doped ZnO was suppressed. The prepared Ce-doped ZnO showed much enhanced photocatalytic property than pure ZnO. When the doping concentration of Ce was 2 mol%, the Ce-doped ZnO photocatalysts showed best photocatalytic activity with 99.10% degradation of methylene blue solution after 2 h.

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“…The axis of the optical fiber collecting the light emitted by the sample makes an angle of 90°with the axis of the laser beam. Third order nonlinear optical susceptibilities x 3 of undoped and doped ZnO thin films were examined by the THG method [38]. The experimental arrangement that we used for the measurements of the generation of the third harmonic, represented on the Figure 2, uses a laser of the type (Q-switched mode-locked Nd: YAG) whose fundamental beam has a wavelength of 1064 nm, it is a model (Quantum elite).…”

Section: Methodsmentioning

confidence: 99%

Red luminescence and UV light generation of europium doped zinc oxide thin films for optoelectronic applications

Jouad¹,

Bouabdalli²,

Touhtouh³

et al. 2020

Eur. Phys. J. Appl. Phys.

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In the present work, the Europium doped Zinc Oxide thin films were elaborated using spray pyrolysis technique. We are interested in investigating the structural properties, photoluminescence (PL) and third harmonic generation (THG) of the elaborated films. The structural properties of as-prepared thin films were characterized by X-ray diffraction (XRD). It confirms that all deposited thin films of Europium doped Zinc Oxide are crystallized in the hexagonal wurtzite structure. Both undoped and doped europium thin films show strong preferred c-axis orientation. Photoluminescence (PL) emission from Europium doped Zinc Oxide thin films, under excitation by 266 nm, shows characteristic transitions of Europium (5D0→7F0, 5D0→7F1, 5D0→7F2, …). It reveals the good incorporation of Eu3+ ions in the ZnO host. Additionally, the 5D07F2 is the most intense transition usually observed for Eu3+ embedded in materials of Zinc Oxide lattice. The dependence of third-order nonlinear susceptibility on doping rate was evaluated. The highest nonlinear susceptibility χ3 is obtained for the 5% Europium doped ZnO sample.

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Roughness effect on photoluminescence of cerium doped zinc oxide thin films

Cited by 38 publications

References 20 publications

Shape tunable synthesis of Eu- and Sm-doped ZnO microstructures: a morphological evaluation

Shape tunable synthesis of Eu- and Sm-doped ZnO microstructures: a morphological evaluation

Influence of Ce doping on structure, morphology, and photocatalytic activity of three-dimensional ZnO superstructures synthesized via coprecipitation and roasting processes

Red luminescence and UV light generation of europium doped zinc oxide thin films for optoelectronic applications

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