Eu-doped ZnO nanoparticles for dielectric, ferroelectric and piezoelectric applications

Yadav, Harsh; Sinha, Nidhi; Goel, Sahil; Kumar, Binay

doi:10.1016/j.jallcom.2016.07.329

Cited by 99 publications

(26 citation statements)

References 42 publications

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“…The generalized Hook's Law, σ = E hkl ϵ, where ϵ and E hkl represents strain and Young's Modulus (Equation ), respectively. The elastic compliances S ij in Equation refers to S 11 , S 13 , S 33 and S 44 with values 7.858 × 10 −12 , 6.940 × 10 −12 , −2.206 × 10 −12 , and 23.57 × 10 −12 m 2 N −1 , respectively for materials with hexagonal crystal phase. Hence, Equation presents the modified W‐H (USDM) equation:…”

Section: Resultsmentioning

confidence: 99%

“…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%

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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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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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

View full text Add to dashboard Cite

show abstract

“…Also, ZnO is transparent to visible light and can be made highly conductive by doping [5][6][7]. Moreover, due to its unique characteristics of crystal structure, the lack of a symmetry center in wurtzite structure and large electromechanical coupling result in strong piezoelectric and pyroelectric properties and show predominant applications in mechanical actuators and piezoelectric sensors [8][9][10], chemical sensors [11,12] and solar cells [13,14].…”

Section: Introductionmentioning

confidence: 99%

Property of Zinc Oxide (Zno) Nanostructures Potential for Biomedical System and Its Common Growth Mechanism

Guo

2017

JABB

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Zinc Oxide (ZnO) nanomaterials have received broad attention thanks to their distinguished performance in electronics, optics and photonics. Due to the novel applications in optoelectronics, sensors, transducers and biomedical sciences, ZnO materials have become a leading edge in nanotechnology. Therefore, the properties of ZnO nanostructures potential for applying in biotechnology are marked along with the relevant common growth mechanism aim to provide the vital information about the growing field related to nano-ZnO in the biomedical system with environmental friendly nature and biocompatibility.

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“…Meanwhile, Cr-doped ZnO NRs have a very small d 33 value of 1.68 pm/V (Sinha et al, 2014). Besides, Europium-doped ZnO NRs have the mean d 33 of 43.38 pm/V (Yadav et al, 2016). Therefore, the morphology and doping play important role for enhancing the performance of PENGs based on ZnO nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Simple Fabrication and Characterization of Piezoelectric Nanogenerators from Cobalt-Doped Zinc Oxide Nanofibers

Suyitno

Hadi

Sahdan

et al. 2017

American Journal of Applied Sciences

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The ferromagnetic cobalt doped into Zinc Oxide (ZnO) crystals is a promising method for enhancing the performance of PiezoelectricBased Nano Generators (PENGs). The study reports the characterization and testing PENGs which simply fabricated from cobalt-doped ZnO nanofibers (NFs) synthesized by electro spinning machine. The electro spinning processes were conducted at a flow rate of 4 µL/min and at various cobalt concentrations followed by sintering at a temperature of 500°C. The X-Ray Diffraction (XRD) spectra demonstrate that the crystalline diameter of Co-doped ZnO NFs increased as the content of cobalt increased, up to a concentration of 9%. Meanwhile, the maximum output voltage and power density of PENGs with Co-doped ZnO NFs were 221.6 mV and 148.8 nW/cm 2 , respectively when the PENGs were subjected to a cyclic mechanical load of 0.5 kg. Therefore, PENGs fabricated from Co-doped ZnO NFs are challenging for the next generation of self-powered devices.

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Eu-doped ZnO nanoparticles for dielectric, ferroelectric and piezoelectric applications

Cited by 99 publications

References 42 publications

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

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

Property of Zinc Oxide (Zno) Nanostructures Potential for Biomedical System and Its Common Growth Mechanism

Simple Fabrication and Characterization of Piezoelectric Nanogenerators from Cobalt-Doped Zinc Oxide Nanofibers

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