Eu-doped ZnO nanoparticles prepared by the combustion reaction method: Structural, photoluminescence and dielectric characterization

Pessoni, H.V.S.; Maia, Lauro J. Q.; Franco, A.

doi:10.1016/j.mssp.2014.09.039

Cited by 59 publications

(16 citation statements)

References 35 publications

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“…Examples of these methods are co-precipitation, sol-gel, combustion, solvothermal, microwave, etc. [21,[26][27][28][29]. An alternative is a gel-combustion reaction technique, as it does not involve intermediate composition or steps of calcinations, to make a synthesis of these Eu-doped ZnO compounds quick and cheap [30][31][32].…”

Section: Introductionmentioning

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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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: Introductionmentioning

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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“…Applications such as high‐speed integrated packages demand materials with dielectric constant below 3.5 in contrast to the satellite communication applications that require materials with low dielectric loss and dielectric constant equal to 2.5. Several research groups have reported the improvement in the dielectric properties of ZnO via doping of RE and TM ions for various applications . Yadav et al reported the effect of Eu doping in ZnO on dielectric, ferroelectric, and piezoelectric applications.…”

Section: Introductionmentioning

confidence: 99%

“…Several research groups have reported the improvement in the dielectric properties of ZnO via doping of RE and TM ions for various applications. 1,2,4,[14][15][16][17] Yadav et al 14 reported the effect of Eu doping in ZnO on dielectric, ferroelectric, and piezoelectric applications. The group reported a higher dielectric constant and ferroelectric phase transition at 230°C.…”

Section: Introductionmentioning

confidence: 99%

Effect of dilute concentrations of Sm on the temperature‐dependent electrical and dielectric properties of ZnO

Arora

Kumar²,

Kaur

et al. 2018

J Am Ceram Soc

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Compounds of undoped and samarium (Sm) doped ZnO have been prepared by standard solid‐state reaction method. X‐ray diffraction (XRD), Williamson‐Hall (W‐H) analysis, Transmission Electron Microscopy (TEM), temperature‐dependent electrical and dielectric studies have been done to characterize these materials. Inclusion of Sm as dopant in hexagonal wurtzite ZnO changes the lattice parameters to a small extent with some Sm aggregation at higher concentration. Also, the mean particle sizes of ZnO:Sm compounds showed an inter‐correlation with the Scherrer method, W‐H analysis as well as with TEM results. The electrical resistivity depicts an exponential decay and metal‐semiconductor transition (MST) at ~300 K for the pristine sample whereas there is large decrement in the resistivity with Sm doping. The analysis of σac of ZnO suggests that the power law is obeyed and indicated an increase in the ac conductivity with Sm content. The mechanism behind this type of conductivity is elucidated by small polaron tunneling (SPT) model of conductivity. The dependence of ln dc on the temperature inverse shows that the traps of electrons are thermally activated such that low and high temperature activation energies confirm the presence of vacancies and interstitials of both O and Zn ions. Thus, a high value of dielectric constant makes these materials suitable for high frequency and charge storage device applications.

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“…In addition room temperature ferromagnetism with high Curie temperature has been observed in ZnO compounds doped with appropriate transition metals (Fe, Co, Mn, etc.) [17,19,18] and rare earth ions [20,21].…”

Section: Introductionmentioning

confidence: 99%

Enhanced dielectric constant of Co-doped ZnO nanoparticulate powders

Franco

Pessoni

2015

Physica B: Condensed Matter

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Eu-doped ZnO nanoparticles prepared by the combustion reaction method: Structural, photoluminescence and dielectric characterization

Cited by 59 publications

References 35 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

Effect of dilute concentrations of Sm on the temperature‐dependent electrical and dielectric properties of ZnO

Enhanced dielectric constant of Co-doped ZnO nanoparticulate powders

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