Influences of Co doping on the structural and optical properties of ZnO nanostructured

被引：73

作者：

Khan, M. A. Majeed ^{[1
]}

Khan, M. Wasi ^{[1
]}

Alhoshan, Mansour ^{[1
,2
]}

AlSalhi, M. S. ^{[1
,3
]}

Aldwayyan, A. S. ^{[1
,3
]}

机构：

[1] King Saud Univ, King Abdullah Inst Nanotechnol, Riyadh 11451, Saudi Arabia

[2] King Saud Univ, Dept Chem Engn, Riyadh 11421, Saudi Arabia

[3] King Saud Univ, Dept Phys & Astron, Riyadh 11451, Saudi Arabia

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2010年 / 100卷 / 01期

关键词：

PHOTOLUMINESCENCE; THICKNESS; FILMS;

D O I：

10.1007/s00339-010-5840-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pure and Co-doped ZnO nanostructured samples have been synthesized by a chemical route. We have studied the structural and optical properties of the samples by using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), field-emission transmission electron microscope (FETEM), energy-dispersive X-ray (EDX) analysis and UV-VIS spectroscopy. The XRD patterns show that all the samples are hexagonal wurtzite structures. Changes in crystallite size due to mechanical activation were also determined from X-ray measurements. These results were correlated with changes in particle size followed by SEM and TEM. The average crystallite sizes obtained from XRD were between 20 to 25 nm. The TEM images showed the average particle size of undoped ZnO nanostructure was about 20 nm whereas the smallest average grain size at 3% Co was about 15 nm. Optical parameters such as absorption coefficient (alpha), energy band gap (E (g) ), the refractive index (n), and dielectric constants (sigma) have been determined using different methods.

引用

页码：45 / 51

页数：7

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