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Effect of Co doping, capping agent and optical-structural studies of ZnO:Co2+ nanoparticles

Published online by Cambridge University Press:  11 August 2011

S.M. Taheri Otaqsara
S.M. Taheri Otaqsara*
Affiliation:
Faculty of Science, Majlesi Branch, Islamic Azad University, Isfahan, Islamic Republic of Iran
*
ae-mail: [email protected]
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Abstract

Co2+ doped ZnO nanoparticles (NPs) using PEG as a capping agent were prepared by colloidal wet-chemical method. The structure, morphology and characteristics of as-prepared samples were investigated. X-ray diffraction patterns studies revealed wurtzite crystal phase. STM-TEM micrographs show a spherical shape and nearly well distribution with an average particle size of ~15–20 nm. UV-VIS spectra show the presence of exciton peak at 349 nm which can be effectively tuned versus cobalt doping and PEG concentration. PL studies were done under the excitation of 347 nm, which exhibited a UV (~386 nm) and visible (blue-orange) emission peak because of free-exciton recombination and oxygen vacancy.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 55 , Issue 2: International Symposium on Flexible Organic Electronics 2010 (ISFOE) , August 2011 , 20403
Copyright
© EDP Sciences, 2011

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