Structural and optical characterizations of n-type doped ZnO by sol-gel method for photovoltaic

Mn, Fe doped ZnO powders (Zn0.95-xMnxFe0.05O2, x≤0.05) were synthesized by an ameliorated sol-gel method, using Zn(CH3COO)2, Mn(CH3COO)2and FeCl2as the raw materials, with the addition of vitamin C as a kind of chemical reducer. The resulting powder was subsequently compacted under pressure of 10 MPa at the temperature of 873K in vacuum. The crystal structure and magnetic properties of Zn0.95-xMnxFe0.05O2powder and bulk samples have been investigated by X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). X-ray photoelectron spectroscopy (XPS) was used to study chemical valence of manganese, iron and zinc in the samples. The x-ray diffraction (XRD) results showed that Zn0.95-xMnxFe0.05O (x≤0.05) samples were single phase with the ZnO-like wurtzite structure. No secondary phase was found in the XRD spectrum. X-ray photoelectron spectroscopy (XPS) showed that Fe and Mn existed in Zn0.95-xMnxFe0.05O2samples in Fe2+and Mn2+states. The results of VSM experiment proved the room temperature ferromagnetic properties (RTFP) of Mn, Fe co-doped ZnO samples.

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Al-doped ZnO thin films by sol–gel method

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2003.10.112 ◽

2004 ◽

Vol 180-181 ◽

pp. 659-662 ◽

Cited By ~ 179

Author(s):

V Musat ◽

B Teixeira ◽

E Fortunato ◽

R.C.C Monteiro ◽

P Vilarinho

Keyword(s):

Thin Films ◽

Sol Gel ◽

Zno Thin Films ◽

Gel Method ◽

Sol Gel Method ◽

Doped Zno

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Synthesis and Characterization of Nanocrystalline ZnO Doped with Al3+ and Ni2+ by a Sol–Gel Method Coupled with Ultrasound Irradiation

Crystals ◽

10.3390/cryst8110406 ◽

2018 ◽

Vol 8 (11) ◽

pp. 406 ◽

Cited By ~ 9

Author(s):

M. Robles-Águila ◽

J. Luna-López ◽

Álvaro Hernández de la Luz ◽

J. Martínez-Juárez ◽

M. Rabanal

Keyword(s):

Sol Gel ◽

Nitrogen Adsorption ◽

Ultrasound Irradiation ◽

Morphological Properties ◽

Nanocrystalline Powders ◽

Metallic Ions ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Doped Zno

Zinc oxide is one of the most important semiconducting metal oxides and one of the most promising n-type materials, but its practical use is limited because of both its high thermal conductivity and its low electrical conductivity. Numerous studies have shown that doping with metals in ZnO structures leads to the modification of the band gap energy. In this work, Al-doped ZnO, Ni-doped ZnO, and undoped ZnO nanocrystalline powders were prepared by a sol–gel method coupled with ultrasound irradiation, and the results show the influence of Al3+ and Ni2+ ions in the ZnO network. The doping concentrations in ZnO of 0.99 atom % for ZnO–Al and 0.80 atom % for ZnO–Ni were obtained by X-ray Fluorescence (XRF). X-ray Diffraction (XRD) and Raman Spectroscopy showed a decreased intensity and broadening of main peaks, indicating metallic ions. The crystallite size of the sample was decreased from 24.5 nm (ZnO) to 22.0 nm (ZnO–Al) and 21 nm (ZnO–Ni). The textural and morphological properties were analyzed via Nitrogen Adsorption (BET method) and Field Emission Scanning Electron Microscopy (FESEM).

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Preparation, structural, photoluminescence and magnetic studies of Cu doped ZnO nanoparticles co-doped with Ni by sol–gel method

Physica E Low-dimensional Systems and Nanostructures ◽

10.1016/j.physe.2015.06.012 ◽

2015 ◽

Vol 74 ◽

pp. 93-100 ◽

Cited By ~ 33

Author(s):

D. Theyvaraju ◽

S. Muthukumaran

Keyword(s):

Zno Nanoparticles ◽

Sol Gel ◽

Magnetic Studies ◽

Gel Method ◽

Sol Gel Method ◽

Doped Zno ◽

Co Doped

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SYNTHESIS OF ZnO-Аg NANOPARTICLES BY SOL-GEL METHOD

Contemporary Materials ◽

10.7251/comen1901022j ◽

2019 ◽

Vol 10 (1) ◽

Author(s):

Savka Janković ◽

Dragana Milisavić ◽

Tanja Okolić ◽

Dijana Jelić

Keyword(s):

Zno Nanoparticles ◽

Wide Spectrum ◽

Sol Gel ◽

Synthesis Method ◽

Material Surface ◽

Characterization Methods ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Doped Zno

Zinc oxide is a highly applicable semiconductor material. Wide applica-tion of this nanomaterial is connected to wide spectrum of energy band gap, high bond en-ergy, great thermal conductivity, but also with its non-toxicity, antibacterial activity, bio-compatibility and biodegradability characteristics. The aim of this paper is synthesis and characterization of silver doped ZnO nanoparticles (ZnO:Ag NP) using sol-gel method. Ob-tained samples of silver doped ZnO nanoparticles were characterized by following tech-niques: Fourier-transform infrared spectroscopy (FTIR), UV/VIS spectrophotometry, X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spec-troscopy (EDX). Efficiency of provided synthesis method was examined by FTIR spectros-copy. XRD determined the purity and crystallinity, and wurtzite structure of synthesized material. Surface morphology and the effect of doping were examined using SEM and EDX characterization methods. Results showed better conductivity after doping ZnO nanoparti-cles with silver. SEM micrographs showed ZnO:Ag NP in the form of nanorods with a par-ticle average size of 6 nm.

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Optical Properties of Sn Doped ZnO Thin Film Prepared Using Sol-Gel Method for Optical Limiting Application

Al-Nahrain Journal of Science ◽

10.22401/anjs.24.3.06 ◽

2021 ◽

Vol 24 (3) ◽

pp. 38-42

Author(s):

Marwa Mudfer Alqaisi ◽

◽

Alla J. Ghazai ◽

Keyword(s):

Thin Films ◽

Zinc Oxide ◽

Optical Properties ◽

Sol Gel ◽

Visible Region ◽

Optical Limiting ◽

Pure Zinc ◽

Gel Method ◽

Sol Gel Method ◽

Doped Zno

In this work, pure Zinc oxide and tin doped Zinc oxide thin films nanoparticles with various volume concentrations of 2, 4, 6, and 8V/V% were prepared by using the sol-gel method. The optical properties were investigated by using UV-Visible spectroscope, and the value exhibits the direct allowed transition. The average of transmittance was around ~(17-23) %in visible region. The optical energy band gap was calculated with wavelength (300-900) nm for pure ZnO and Sn doped ZnO thin films which decreases with increasing concentration from 3.4 eV to 3.1 eV respectively and red shift. The real dielectric(εr) and the imaginary dielectric εiare the same behavior of the refractive index(n) the extinction coefficient (k) respectively. The optical limiting properties were studied by using an SDL laser with a wavelength of 235 nm. ZnO and doping thin films an found efficient as optic limiting and depend on the concentration of the all samples.

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