scholarly journals Magnetic and optical properties of Co doped ZnO powders synthesized by solid-state reaction

2006 ◽  
Vol 55 (5) ◽  
pp. 2557
Author(s):  
Liu Xue-Chao ◽  
Shi Er-Wei ◽  
Song Li-Xin ◽  
Zhang Hua-Wei ◽  
Chen Zhi-Zhan
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
Zno Powders ◽  
Doped Zno ◽  
Co Doped

Preparation, infrared emissivity and thermochromic properties of Co doped ZnO by solid state reaction

2017 ◽  
Vol 720 ◽  
pp. 105-115 ◽  
Author(s):  
Yongmei Zhu ◽  
Guoyue Xu ◽  
Tengchao Guo ◽  
Haili Hou ◽  
Shujuan Tan
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Infrared Emissivity ◽  
Thermochromic Properties ◽  
Doped Zno ◽  
Co Doped

scholarly journals The role of Ln3+ (Ln = Eu, Yb) in persistent red luminescence in MgGeO3:Mn2+

2017 ◽  
Vol 5 (34) ◽  
pp. 8893-8900 ◽  
Author(s):  
Y. Katayama ◽  
T. Kayumi ◽  
J. Ueda ◽  
P. Dorenbos ◽  
B. Viana ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Technique ◽  
Red Luminescence ◽  
Co Doped

In this paper, Mn2+ and Ln3+ (Ln = Eu, Yb) co-doped MgGeO3 phosphors were prepared using a solid state reaction technique, and their optical properties were investigated.

Influence of annealing atmosphere on optical properties of Al-doped ZnO powders

2012 ◽  
Vol 209 (8) ◽  
pp. 1538-1542 ◽  
Author(s):  
Chundong Li ◽  
Jinpeng Lv ◽  
Bo Zhou ◽  
Zhiqiang Liang
Keyword(s):  
Optical Properties ◽  
Annealing Atmosphere ◽  
Zno Powders ◽  
Doped Zno

Synthesis and optical properties of Co-doped ZnO nanofibers prepared by electrospinning

Optik ◽  
2014 ◽  
Vol 125 (10) ◽  
pp. 2361-2364 ◽  
Author(s):  
Huawa Yu ◽  
Huiqing Fan ◽  
Xin Wang ◽  
Jing Wang
Keyword(s):  
Optical Properties ◽  
Zno Nanofibers ◽  
Doped Zno ◽  
Co Doped

Effect of cobalt doping on microstructures and dielectric properties of ZnO

2019 ◽  
Vol 97 (3) ◽  
pp. 227-232 ◽  
Author(s):  
Ye Zhao ◽  
Fan Tong ◽  
Mao Hua Wang
Keyword(s):  
Zno Nanoparticles ◽  
Sol Gel ◽  
Hexagonal Wurtzite Structure ◽  
Sem Analysis ◽  
Co Doping ◽  
In Doping ◽  
Zno Powders ◽  
Doped Zno ◽  
Zno Crystal ◽  
Co Doped

Pure and cobalt-doped ZnO nanoparticles (2.5, 5, 7.5, and 10 atom % Co) are synthesized by sol–gel method. The as-synthesized nanoparticles are characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FE-SEM) analysis. The nanoparticles of 0, 2.5, and 5 atom % Co-doped ZnO exhibited hexagonal wurtzite structure and have no other phases. Moreover, the (101) diffraction peaks position of Co-doped ZnO shift toward a smaller value of diffraction angle compared with pure ZnO powders. The results confirm that Co ions were well incorporated into ZnO crystal lattice. Simultaneously, Co doping also inhibited the growth of particles, and the crystallite size decreased from 43.11 nm to 36.63 nm with the increase in doping concentration from 0 to 10 atom %. The values of the optical band gap of all Co-doped ZnO nanoparticles gradually decreased from 3.09 eV to 2.66 eV with increasing Co content. Particular, the dielectric constant of all Co-doped ZnO ceramics gradually increased from 1.62 × 103 to 20.52 × 103, and the dielectric loss decreased from 2.36 to 1.28 when Co content increased from 0 to 10 atom %.

scholarly journals Electronic Structure and Optical Properties of Co and Fe Doped ZnO

2016 ◽  
Vol 43 ◽  
pp. 23-28 ◽  
Author(s):  
Chun Ping Li ◽  
Ge Gao ◽  
Xin Chen
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Electronic Structures ◽  
Density Functional ◽  
Band Gaps ◽  
First Principle ◽  
Functional Theory ◽  
Doped Zno ◽  
Pseudo Potential ◽  
Co Doped

First-principle ultrasoft pseudo potential approach of the plane wave based on density functional theory (DFT) has been used for studying the electronic characterization and optical properties of ZnO and Fe, Co doped ZnO. The results show that the doping impurities change the lattice parameters a little, but bring more changes in the electronic structures. The band gaps are broadened by doping, and the Fermi level accesses to the conduction band which will lead the system to show the character of metallic properties. The dielectric function and absorption peaks are identified and the changes compared to pure ZnO are analyzed in detail.

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