Enhancement of photoluminescence in Sr doped ZnO thin films prepared by spray pyrolysis

Raghavendra, P. V.; Bhat, J. S.; Deshpande, Nishad G.

doi:10.1016/j.mssp.2017.06.028

Cited by 38 publications

(8 citation statements)

References 55 publications

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“…The increase in the E U value and the decrease in the E g value with increasing Sr concentration (table 1) are attributed to the formation of defect states near the conduction band, causing further reduction in the optical band gap. A comparative result was observed by Raghavendra et al [37] who reported that Sr-doping of ZnO induces a decrease in the band gap energy. Similar observation was also reported in the case of Cd-doped ZnO [57].…”

Section: Electronic Propertiesmentioning

confidence: 65%

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Hydrothermal synthesis of strontium-doped ZnS nanoparticles: structural, electronic and photocatalytic investigations

et al. 2019

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Strontium-doped ZnS nanoparticles (NPs) (1.5, 5 and 9 wt%) were synthesized through a surfactant free hydrothermal method. The structural characterization by X-ray diffraction confirms the synthesis of ZnS, with its two crystalline phases (cubic and hexagonal), without apparition of any peaks related to Sr phases. The crystallite size is affected by Sr doping concentration and was estimated in the range of 2.24-2.51 nm. Furthermore, transmission electron microscopy images show that the NPs have great tendency to aggregate into spherical shapes. Spectroscopy analysis revealed vibration modes specific to ZnS materials on the Raman spectra at about 260 and 345 cm −1 and on Fourier-transform infrared spectra at 668.9 cm −1. Electronic investigation performed by UV-Visible diffuse reflectance spectroscopy showed that the synthesized ZnS NPs are optically transparent in the visible domain and their band gap energy decreases from 3.42 to 3.38 eV with increasing Sr concentration. Finally, the methyl orange degradation rate increases with Sr concentration, revealing an improvement in the photocatalytic properties of Sr-doped ZnS NPs.

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Section: Electronic Propertiesmentioning

confidence: 65%

“…where h, k and l are Miller indices of the Bragg planes. From the XRD patterns, a slight shift in the peak positions is observed for the Sr-doped samples compared to the undoped-ZnS NPs, denoting a weak change in the lattice parameters (5.27-5.30 Å) due to the incorporation of larger Sr 2+ replacing Zn 2+ in the ZnS lattice [36][37][38].…”

Section: Xrd Analysismentioning

confidence: 96%

Hydrothermal synthesis of strontium-doped ZnS nanoparticles: structural, electronic and photocatalytic investigations

et al. 2019

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“…This phenomenon suggests an increase in lattice parameters. 24,25 This can be explained by the Sn ions being replaced by alkaline earth metal ions with larger ion radii, resulting in an expansion of the host lattice. The shift in angle of the Sr 2+ ion doped sample is the largest while that of the Mg 2+ ion doped sample is the smallest, which indicates that the lattice parameters increase with variation in doped ion types from Mg 2+ to Ca 2+ and then to Sr 2+ .…”

Section: Methodsmentioning

confidence: 99%

Alkaline earth metal ion doping to enhance the light emission from Er³⁺:SnO₂ nanocrystal Co-doped silica films

Qu¹,

Zhang²,

Wang³

et al. 2023

Phys. Chem. Chem. Phys.

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“…nevertheless, due to the growing interest on the incorporation of alkaline earth metals onto the ZnO lattice, mainly for the improvement of ZnO nanostructures for photocatalysis and antibacterial applications [32,33], few reports on Sr incorporation effects on physical properties of ZnO have been published recently [34][35][36].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Structural, optical and vibrational properties of ZnO:M (M=Al3+ and Sr2+) nano and micropowders grown by hydrothermal synthesis

Marin

Soliz

Gutierrez

et al. 2019

Journal of Alloys and Compounds

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Powders of ZnO and ZnO:M (M = Al 3+ and Sr 2+) with 1 and 4% of M nominal content were synthetized by a hydrothermal method in a diethanolamine (DEA) medium. The samples were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), micro-Raman and photoluminescence (PL). The powder particles were spherical with average radius decreasing from 1 µm down to 70 nm with increasing Al 3+ nominal content but nearly independent on the Sr 2+ nominal content. The XRD and micro-Raman results indicate that both Al 3+ and Sr 2+ mostly incorporated substitutionally into the ZnO lattice, giving rise to compressive and tensile strain, respectively, as a result of ionic radii differences. The PL spectra for ZnO:Al exhibit a dopant-induced contribution at ∼3.1 eV, which is not observed for ZnO:Sr, due to radiative transitions involving trapping of photocarriers at theoretically expected substitutional Al 3+ donor states or at Zn interstitial defects.

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Enhancement of photoluminescence in Sr doped ZnO thin films prepared by spray pyrolysis

Cited by 38 publications

References 55 publications

Hydrothermal synthesis of strontium-doped ZnS nanoparticles: structural, electronic and photocatalytic investigations

Hydrothermal synthesis of strontium-doped ZnS nanoparticles: structural, electronic and photocatalytic investigations

Alkaline earth metal ion doping to enhance the light emission from Er³⁺:SnO₂ nanocrystal Co-doped silica films

Structural, optical and vibrational properties of ZnO:M (M=Al3+ and Sr2+) nano and micropowders grown by hydrothermal synthesis

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Enhancement of photoluminescence in Sr doped ZnO thin films prepared by spray pyrolysis

Cited by 38 publications

References 55 publications

Hydrothermal synthesis of strontium-doped ZnS nanoparticles: structural, electronic and photocatalytic investigations

Hydrothermal synthesis of strontium-doped ZnS nanoparticles: structural, electronic and photocatalytic investigations

Alkaline earth metal ion doping to enhance the light emission from Er3+:SnO2 nanocrystal Co-doped silica films

Structural, optical and vibrational properties of ZnO:M (M=Al3+ and Sr2+) nano and micropowders grown by hydrothermal synthesis

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Product

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Alkaline earth metal ion doping to enhance the light emission from Er³⁺:SnO₂ nanocrystal Co-doped silica films