Effect of Gd doping on structure and photoluminescence properties of ZnO nanocrystals

Sahu, Dojalisa; Panda, Nihar Ranjan; Acharya, B. S.

doi:10.1088/2053-1591/aa9597

Cited by 47 publications

(23 citation statements)

References 53 publications

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“…The observed blue emission band at 470 nm was associated with the intrinsic defects emission within the ZnO host [64]. Some groups also indicate that this blue emission arises as a result of the recombination of zinc interstitial energy level to zinc vacancy energy level [57,65]. Oxygen vacancies and intrinsic defects can be attributed to the origin of the green band (541) [66].…”

Section: Uv-vis Spectroscopymentioning

confidence: 95%

“…The sharp UV emission band at 383 nm was associated with the near band-edge (NBE) emission of ZnO [56]. This band origin is due to the direct recombination of ZnO free excitons [57,58]. The wide noticeable range in 400 nm to 600 nm wavelength region is due to deep-level defects in the crystal such as vacancies and oxygen and zinc interstitials [59,60].…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

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Bright red luminescence emission of macroporous honeycomb-like Eu3+ ion-doped ZnO nanoparticles developed by gel-combustion technique

Naik

Viswanath

et al. 2020

SN Appl. Sci.

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The impact of europium (Eu 3+) ion doping has been outlined in improving the structure and optical properties of macroporous honeycomb-like zinc oxide (ZnO) nanoparticles, produced by the gel-combustion technique by changing the quantity of dopant. The X-ray diffraction (XRD) research verified that the hexagonal wurtzite structure of ZnO was not disturbed by Eu 3+ substitution. Scherrer method, Scherrer plots (SP), Williamson-Hall (W-H) plots and Size-Strain plots (SSP) were used to estimate the crystallite size. Decreased crystallite size in ZnO:Eu 3+ was noticed along with lower angle shift of XRD peaks and increased lattice parameters such as unit cell volume that can be described as replacement result of Eu 3+ at Zn sites. Fourier transform infrared (FTIR) spectroscopy analysis confirmed the Eu 3+ dopant by moving the peak from 474 cm −1 to 525 cm −1. Field-emission scanning electron microscopy (FESEM) pictures verified macroporous honeycomb-like structures. UV-Visible (UV-Vis) absorption spectroscopic studies show that the ability of ZnO:Eu 3+ nanoparticles concerning the absorption of visible light increased upon Eu 3+ doping with a red shift compared to ZnO nanoparticles. Photoluminescence (PL) emission spectra of Eu 3+ doped ZnO nanoparticles exhibited five intense band emissions at 579, 591, 617, 652, and 706 nm ascribed to 5

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Section: Uv-vis Spectroscopymentioning

confidence: 95%

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Bright red luminescence emission of macroporous honeycomb-like Eu3+ ion-doped ZnO nanoparticles developed by gel-combustion technique

Naik

Viswanath

et al. 2020

SN Appl. Sci.

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“…This peak corre- The absorption spectra of ZnO nanoparticle films with and without dye adsorption are shown in Figure 2a, in which the spectra are normalized at 300 nm. For the ZnO nanoparticle film, the absorption spectrum reveals the shoulder at about 360 nm, which corresponds to the absorption band of ZnO nanoparticles [21]. As shown from the Tauc plot in Figure S4, the band gap of synthesized ZnO is determined to be 3 eV (413 nm), which is higher compared to that reported band gap value of 2.88 eV for ZnO thin film [22].…”

Section: Resultsmentioning

confidence: 72%

Optical and Photodetection Properties of ZnO Nanoparticles Recovered from Zn Dross

Diguna¹,

Fitriani²,

Liasari

et al. 2020

Crystals

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In this study, we report the synthesis of ZnO nanoparticles from Zn dross via hydrometallurgical method by using acetic acid as a leaching agent. D205 dye molecules were then adsorbed onto Zn dross originated ZnO nanoparticle film. The optical absorption confirms the photosensitization of the synthesized ZnO nanoparticles with dye. The photoluminescence spectra reveal the excitonic- and defect-related emission of ZnO nanoparticles. Compared to ZnO nanoparticles only, the longer emission lifetime of ZnO nanoparticles with adsorbed dye indicates the transfer of photoexcited electrons from dye to the ZnO nanoparticles. Furthermore, photodetection characterization of ZnO film show the enhanced current density with the presence of dye under simulated solar illumination, while that measured at dark is similar in both films with and without dye. This result confirms the potentiality of Zn dross to be recycled into valuable ZnO nanoparticles particularly for the applications in the visible light region, especially for sensing.

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“…Metal oxide semiconducting nanostructures doped with trivalent lanthanides ions (Ln 3+ ) are one of the most promising materials having most different applications in the field of light-emitting displays, magnetic recording media, photocatalysis and optical storage [1][2][3][4]. The optical emissions arising from the surface defect states of these semiconductors are effectively controlled by incorporating rare earth (RE) ions [1]. RE ions are considered to be the better luminescent centers because of their intra-shell transitions which can produce narrow and intense emission lines [1,5].…”

Section: Introductionmentioning

confidence: 99%

“…The optical emissions arising from the surface defect states of these semiconductors are effectively controlled by incorporating rare earth (RE) ions [1]. RE ions are considered to be the better luminescent centers because of their intra-shell transitions which can produce narrow and intense emission lines [1,5]. The RE ions are incorporated into metal oxide semiconductors for the modification of electronic structure to improve optical, magnetic and catalytic properties [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Gd3+ doping on structural and photocatalytic properties of ZnO obtained by facile microwave-hydrothermal method

et al. 2019

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Gd 3+-doped ZnO nanoparticles with different Gd 3+ concentrations were synthesized by an eco-friendly microwave hydrothermal method. X-ray diffraction measurements confirm that the prepared nanoplates exhibit hexagonal wurtzite structure. Gd 3+ doping induces lattice expansion of ZnO due to the larger ionic radius of rare earth Gd 3+ in relation to Zn 2+ ions. Rietveld refinement, Raman and Photoluminescence (PL) spectra confirm that Gd 3+ ions were successfully inserted into ZnO lattice. The 2.0 mol% Gd 3+ doped sample exhibits an increased photoluminescence intensity in comparison to that for the undoped ZnO, which is attributed to the enhance in the defect concentration due to Gd 3+ doping. The photocatalytic activities of the samples were also evaluated towards UV-A induced degradation of methylene blue in aqueous solution. The highest photocatalytic activity was observed for 1.0 mol% Gd 3+-doped ZnO nanoparticles (73% for methylene blue degradation within 150 min under UV-Vis irradiation). The particles size, agglomeration degree and the electronic effects due to the Gd 3+ dopping seems to be the main parameters that affect the photocatalytic activity of Gd 3+-doped ZnO nanoparticles.

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Effect of Gd doping on structure and photoluminescence properties of ZnO nanocrystals

Cited by 47 publications

References 53 publications

Bright red luminescence emission of macroporous honeycomb-like Eu3+ ion-doped ZnO nanoparticles developed by gel-combustion technique

Bright red luminescence emission of macroporous honeycomb-like Eu3+ ion-doped ZnO nanoparticles developed by gel-combustion technique

Optical and Photodetection Properties of ZnO Nanoparticles Recovered from Zn Dross

Effect of Gd3+ doping on structural and photocatalytic properties of ZnO obtained by facile microwave-hydrothermal method

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