Sol–gel synthesis of Y2O3-doped ZnO thin films varistors and their electrical properties

Xu, Dong; Jiang, Bin; Jiao, Lei; Cui, Fengdan; Xu, Hanqing; Yang, Yantao; Yu, Renhong; Cheng, Xiao-nong

doi:10.1016/s1003-6326(12)61693-8

Cited by 22 publications

(2 citation statements)

References 25 publications

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“…The ZnO seed solution was synthesized as previously reported [ 18 – 20 ]. Briefly, 1632 mg of zinc acetate powder was diluted in 40 ml of isopropyl alcohol to obtain 0.2 M ZnO seed solution.…”

Section: Methodsmentioning

confidence: 99%

Low Temperature Annealed Zinc Oxide Nanostructured Thin Film-Based Transducers: Characterization for Sensing Applications

Haarindraprasad¹,

Hashim²,

Gopinath

et al. 2015

PLoS ONE

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The performance of sensing surfaces highly relies on nanostructures to enhance their sensitivity and specificity. Herein, nanostructured zinc oxide (ZnO) thin films of various thicknesses were coated on glass and p-type silicon substrates using a sol-gel spin-coating technique. The deposited films were characterized for morphological, structural, and optoelectronic properties by high-resolution measurements. X-ray diffraction analyses revealed that the deposited films have a c-axis orientation and display peaks that refer to ZnO, which exhibits a hexagonal structure with a preferable plane orientation (002). The thicknesses of ZnO thin films prepared using 1, 3, 5, and 7 cycles were measured to be 40, 60, 100, and 200 nm, respectively. The increment in grain size of the thin film from 21 to 52 nm was noticed, when its thickness was increased from 40 to 200 nm, whereas the band gap value decreased from 3.282 to 3.268 eV. Band gap value of ZnO thin film with thickness of 200 nm at pH ranging from 2 to 10 reduces from 3.263eV to 3.200 eV. Furthermore, to evaluate the transducing capacity of the ZnO nanostructure, the refractive index, optoelectric constant, and bulk modulus were analyzed and correlated. The highest thickness (200 nm) of ZnO film, embedded with an interdigitated electrode that behaves as a pH-sensing electrode, could sense pH variations in the range of 2-10. It showed a highly sensitive response of 444 μAmM-1cm-2 with a linear regression of R2 =0.9304. The measured sensitivity of the developed device for pH per unit is 3.72μA/pH.

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Section: Methodsmentioning

confidence: 99%

Low Temperature Annealed Zinc Oxide Nanostructured Thin Film-Based Transducers: Characterization for Sensing Applications

Haarindraprasad¹,

Hashim²,

Gopinath

et al. 2015

PLoS ONE

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“…Among of them, the hydrothermal synthesis method is a promising candidate owing to their controllability, simplicity, and economy for large-scale preparation [26]. On the other hand, because of their superior electronic, optical, and magnetic properties, rare earth compounds have been widely used in high performance luminescent devices [27], varistor ceramics [28], catalysts [29], and so on. Doping with suitable elements of the rare earth compounds to modify the electronic, optical, and magnetic properties of metal oxide semiconductor materials is an effective strategy [30].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Eu Doping on Microstructure, Morphology and Methanal-Sensing Performance of Highly Ordered SnO2 Nanorods Array

Zhao

Ren

et al. 2017

Nanomaterials

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Layered Eu-doped SnO2 ordered nanoarrays constructed by nanorods with 10 nm diameters and several hundred nanometers length were synthesized by a substrate-free hydrothermal route using alcohol and water mixed solvent of sodium stannate and sodium hydroxide at 200 °C. The Eu dopant acted as a crystal growth inhibitor to prevent the SnO2 nanorods growth up, resulting in tenuous SnO2 nanorods ordered arrays. The X-ray diffraction (XRD) revealed the tetragonal rutile-type structure with a systematic average size reduction and unit cell volume tumescence, while enhancing the residual strain as the Eu-doped content increases. The surface defects that were caused by the incorporation of Eu ions within the surface oxide matrix were observed by high-resolution transmission electron microscope (HRTEM). The results of the response properties of sensors based on the different levels of Eu-doped SnO2 layered nanoarrays demonstrated that the 0.5 at % Eu-doped SnO2 layered nanorods arrays exhibited an excellent sensing response to methanal at 278 °C. The reasons of the enhanced sensing performance were discussed from the complicated defect surface structure, the large specific surface area, and the excellent catalytic properties of Eu dopant.

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Sol-Gel Materials for Varistor Devices

Anas

Mahesh

Mathews

et al. 2017

Advances in Sol-Gel Derived Materials and Technologies

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Sol–gel synthesis of Y2O3-doped ZnO thin films varistors and their electrical properties

Cited by 22 publications

References 25 publications

Low Temperature Annealed Zinc Oxide Nanostructured Thin Film-Based Transducers: Characterization for Sensing Applications

Low Temperature Annealed Zinc Oxide Nanostructured Thin Film-Based Transducers: Characterization for Sensing Applications

The Effect of Eu Doping on Microstructure, Morphology and Methanal-Sensing Performance of Highly Ordered SnO2 Nanorods Array

Sol-Gel Materials for Varistor Devices

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