Ellipsometric studies of optical properties of Er-doped ZnO thin films synthesized by sol–gel method

Liu, Miao; Tanemura, Sakae; Zhao, Lili; Xiao, Xiudi; Zhang, Xiao Ting

doi:10.1016/j.tsf.2013.02.034

Cited by 17 publications

(9 citation statements)

References 32 publications

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“…The obtained results show that the refractive index is slightly greater than the refractive index of bulk ZnO (2.0) and then become nearly constant with increasing wavelength (Kaid and Ashour 2007). The similar increment in the refractive index is observed for Erdoped ZnO thin films (Miao et al 2013). The refractive index of Al-doped film shows a variation up to 2.64 in the visible region which is preferred for antireflection coating materials.…”

Section: Optical Propertiessupporting

confidence: 64%

Characterization and study of antibacterial activity of spray pyrolysed ZnO:Al thin films

et al. 2015

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Aluminum-doped zinc oxide (ZnO:Al) thin films were deposited onto glass substrates using spray pyrolysis technique with the substrate temperature of 400°C. X-ray diffraction analysis indicated that the films were polycrystalline with hexagonal wurtzite structure preferentially oriented along (002) direction. Surface morphology of the films obtained by scanning electron microscopy showed that the grains were of nanoscale size with porous nature for 6 at.% of Al. Atomic force microscopy observations revealed that the particles size and surface roughness of the films decreased with Al-doping. Optical measurements indicated that ZnO:Al (6 at.%) exhibited a band gap of 3.11 eV, which is lower than that of pure ZnO film, i.e. 3.42 eV. Photoluminescence analysis showed weak NBE emission at 396 nm for Al-doped films. The low resistivity, high hall mobility and carrier concentration values were obtained at a doping ratio of 6 at.% of Al. The effective incorporation of 6 at.% of Al into ZnO lattice by occupying Zn sites yielded a well-pronounced antibacterial activity against Staphylococcus aureus.

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Section: Optical Propertiessupporting

confidence: 64%

Characterization and study of antibacterial activity of spray pyrolysed ZnO:Al thin films

et al. 2015

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“…It is due to this reason that the film exhibited better crystalline nature at 6% of Ti. A similar observation of increased refractive index has been reported in Er doped ZnO thin films [31]. In the present work, the Ti doped ZnO films shows the varied refractive index from 2 to 2.8, that lie very well within the visible region, and therefore it can work well as the material for antireflection coating.…”

Section: Optical Propertiessupporting

confidence: 90%

Structural, morphological and optical characterization of Ti-doped ZnO nanorod thin film synthesized by spray pyrolysis technique

Rajasekaran

Arunachalam²,

Kumaresan³

2020

Mater. Res. Express

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Thin films of pure and Ti metal ion doped ZnO were grown on glass substrate by spray pyrolysis for various doping ratios keeping the temperature at 400°C. Impact of Ti doping on morphological, optical and structural properties of ZnO was investigated. Structural confirmation of the thin-film was analyzed by using X-ray diffraction (XRD) studies and it concluded the successful growth of standard thin films of hexagonal wurtzite structure which was polycrystalline in nature. The morphological studies carried out using Scanning Electronic microscope (SEM), endorsed a uniform distribution of grain that are spherical in nature. Composition analysis by energy dispersive spectroscopy showed the presence of Ti, Zn and O in the films. Average grain size was estimated using Scherrer formula and obtained to be in the range of 35 to 50 nm. Atomic force microscopy was used to provide the surface roughness that had increased with the increase of Ti concentration. In the visible region, these films were found to be highly transparent and the average transmittance was obtained to be 85%. Photoluminescence spectral analysis showed a near band edge emission at 397 nm.

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“…Therefore, it has become essential to control the optical constants of ZnO. Spectroscopic ellipsometry technique is a relevant tool for such optical analysis [8][9][10][11][12][13][14][15][16][17][18][19]. In the previous works in literature, dispersion laws such as Cauchy [8,9], Forouhi-Bloomer [8,9], Tauc-Lorentz [9][10][11][12], Tanguy [13,14] or wavelength-by-wavelength method [20,21] were used to extract the optical constants of ZnO by modeling spectroscopic ellipsometry (SE) data.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of ZnO optical dispersion laws

Bouzourâa

Battie²,

Dalmasso³

et al. 2017

Superlattices and Microstructures

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Ellipsometric studies of optical properties of Er-doped ZnO thin films synthesized by sol–gel method

Cited by 17 publications

References 32 publications

Characterization and study of antibacterial activity of spray pyrolysed ZnO:Al thin films

Characterization and study of antibacterial activity of spray pyrolysed ZnO:Al thin films

Structural, morphological and optical characterization of Ti-doped ZnO nanorod thin film synthesized by spray pyrolysis technique

Comparative study of ZnO optical dispersion laws

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