Structural, optical and magnetic properties of Co doped ZnO DMS nanoparticles by microwave irradiation method

Guruvammal, D.; Selvaraj, S.; Sundar, S. Meenakshi

doi:10.1016/j.jmmm.2017.12.097

Cited by 65 publications

(10 citation statements)

References 62 publications

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“…Due to the Burstein moss effect, resulting in the widening of the band gap. The similar results of decrease in band gap energy in Co-doped ZnO nanoparticles has been reported by D. Guruvammal et al[32]. An appropriate amount of Co doping (e.g., 3 mol%) causes a slightly downward shift of band gap energy, this is helpful for collecting the photo-generated electrons in the pervoskite film with a low energy loss, owning to the reduced difference between band gap energy of Co 2+ -doped ZnO and pervoskite materials.…”

supporting

confidence: 85%

Effect of Co2+ Doped Seed Layer on Morphology and Photoelectric Properties of ZnO Nanoarray

Li¹,

Shi²,

Hou³

et al. 2021

Preprint

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ZnO nanoarray were synthesized by hydrothermal method on Co2+-doped Zn1-xCoxO (x（mol%）=0.00, 0.01, 0.02, 0.03, 0.04, 0.05) seed layers pre-coated on ITO substrate. The effects of different Co2+ doping concentrations on morphology and photoelectric properties of ZnO nanoarray including transient photo-current and charge transfer resistance were investigated. The addition of Co2+ in the seed layer could perfect the oriented growth of ZnO nanoarray and apparently enhance its photo current. FESEM observation confirmed that the ZnO nanoarray were grown in the way perpendicular to ITO substrate along the direction of (002). Meanwhile, UV-vis tests shown that the band gap energy was decreased from 3.37 eV to 3.16 eV due to Co2+ doping and the ZnO nanoarray had a strong visible region in the range 400-650 nm. The transient photo-current was found to vary from 0.005 to 0.15 mA/cm2 under AM 1.5G simulated sunlight illumination. Photoelectric properties was correlated with the recombination of photo-generated charge carriers, which was inhibited with optimal Co2+ doping concentrations and was beneficial for application in perovskite solar cells.

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supporting

confidence: 85%

Effect of Co2+ Doped Seed Layer on Morphology and Photoelectric Properties of ZnO Nanoarray

Li¹,

Shi²,

Hou³

et al. 2021

Preprint

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“… Microwave solvothermal synthesis of ZnO nanocomposites or ZnO hybrid nanostructures without any additional heat treatment, where the literature review results [ 798 , 799 , 800 , 801 , 802 , 803 , 804 , 805 , 806 , 807 , 808 , 809 , 810 , 811 , 812 , 813 , 814 , 815 , 816 , 817 , 818 , 819 , 820 , 821 , 822 ] are summarised in Table 11. Microwave solvothermal synthesis of undoped ZnO, ZnO nanocomposites or ZnO hybrid nanostructures with additional heat treatment, where the literature review results [ 823 , 824 , 825 , 826 , 827 , 828 , 829 , 830 , 831 , 832 , 833 , 834 , 835 , 836 , 837 , 838 ] are summarised in Table 12. …”

Section: Microwave Solvothermal Synthesis Of Znomentioning

confidence: 99%

“…Microwave solvothermal synthesis of undoped ZnO, ZnO nanocomposites or ZnO hybrid nanostructures with additional heat treatment, where the literature review results [ 823 , 824 , 825 , 826 , 827 , 828 , 829 , 830 , 831 , 832 , 833 , 834 , 835 , 836 , 837 , 838 ] are summarised in Table 12.…”

Section: Microwave Solvothermal Synthesis Of Znomentioning

confidence: 99%

“…The microwave solvothermal synthesis enables obtaining: ZnO doped with the following ions: Al 3+ [ 811 , 814 , 815 ], Co 2+ [ 232 , 798 , 799 , 800 , 801 , 808 , 809 , 810 , 812 , 833 , 834 , 835 ], Cr 3+ [ 232 , 809 ], Fe 2+ [ 232 , 810 , 836 ], Ga 3+ [ 815 ], In 3+ [ 811 ], Mg 2+ [ 817 ], Mn 2+ [ 232 , 802 , 804 , 809 , 810 , 812 , 837 ], Ni 2+ [ 232 , 809 , 810 , 813 ] and V 5+ [ 810 ]. ZnO co-doped with the following ions: Co 2+ –Mn 2+ [ 803 ] and Al 3+ –Ga 3+ [ 815 ].…”

Section: Microwave Solvothermal Synthesis Of Znomentioning

confidence: 99%

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A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

2020

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Zinc oxide (ZnO) is a multifunctional material due to its exceptional physicochemical properties and broad usefulness. The special properties resulting from the reduction of the material size from the macro scale to the nano scale has made the application of ZnO nanomaterials (ZnO NMs) more popular in numerous consumer products. In recent years, particular attention has been drawn to the development of various methods of ZnO NMs synthesis, which above all meet the requirements of the green chemistry approach. The application of the microwave heating technology when obtaining ZnO NMs enables the development of new methods of syntheses, which are characterised by, among others, the possibility to control the properties, repeatability, reproducibility, short synthesis duration, low price, purity, and fulfilment of the eco-friendly approach criterion. The dynamic development of materials engineering is the reason why it is necessary to obtain ZnO NMs with strictly defined properties. The present review aims to discuss the state of the art regarding the microwave synthesis of undoped and doped ZnO NMs. The first part of the review presents the properties of ZnO and new applications of ZnO NMs. Subsequently, the properties of microwave heating are discussed and compared with conventional heating and areas of application are presented. The final part of the paper presents reactants, parameters of processes, and the morphology of products, with a division of the microwave synthesis of ZnO NMs into three primary groups, namely hydrothermal, solvothermal, and hybrid methods.

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“…The absorption ranges for doping concentrations of 2%, 4%, 6%, and 8% are 244 nm, 248nm, 372 nm, and 378 nm, respectively. The inherent reason for increases in absorbance may be due to various factors like particle size, oxygen de ciency, and defects in grain structure [ 27].…”

Section: Optical Studiesmentioning

confidence: 99%

The Preparation of Dye Sensitized Solar Cells (DSSC) using Natural dyes Extracted from Terminalia Cattappa Leaves based on Mg doped ZnO as Photoanode.

E¹,

L.²,

Sarathi³

et al. 2021

Preprint

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We report a novel type of Mg-doped ZnO nanoparticles prepared on solvothermal route nanoparticles at different concentrations (2%,4%,6%, and 8%) and used Mg-ZnO as photoanode for dye-sensitized solar cells (DSSC) fabrication. DSSC using Mg-doped ZnO as a semiconductor material and natural dyes Terminalia cattappa as sensitizer were successfully produced. The structural, optical spectra of Mg-ZnO nanopowder were studied using XRD, FESEM-EDX, TEM, SAED patterns, and UV-Visible Spectra, Fourier Transform Infrared (FT-IR). The XRD results show that the crystal size also increases by increasing the dopant concentration of the Mg-doped ZnO sample. The optical spectra show the absorption of the samples increases with the increases of concentration using the UV-Visible analysis and the bandgap energy is calculated by Tauc plot. Mg-doped ZnO nanoparticles prepared at different concentrations were used for the fabrication of DSSC. Furthermore, from the J-V graph, 8% concentration is more effective than other concentrations.

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Structural, optical and magnetic properties of Co doped ZnO DMS nanoparticles by microwave irradiation method

Cited by 65 publications

References 62 publications

Effect of Co2+ Doped Seed Layer on Morphology and Photoelectric Properties of ZnO Nanoarray

Effect of Co2+ Doped Seed Layer on Morphology and Photoelectric Properties of ZnO Nanoarray

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

The Preparation of Dye Sensitized Solar Cells (DSSC) using Natural dyes Extracted from Terminalia Cattappa Leaves based on Mg doped ZnO as Photoanode.

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