Detailed of X-ray diffraction and photoluminescence studies of Ce doped ZnO nanocrystals

Autor: Santa Chawla, M.S. Qureshi, M. Manzar Malik, Achamma George, Suchinder K. Sharma
Rok vydání: 2011
Předmět:
Zdroj: Journal of Alloys and Compounds. 509:5942-5946
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2011.03.017
Popis: Pristine and Ce doped ZnO nanopowders were synthesized by simple refluxing technique. A detailed X-ray diffraction analysis was carried out to evaluate the contribution of dopant ion concentration on strain and lattice parameters. A particle size of 20 nm was obtained via TEM studies. Spherical morphology was obtained for Ce doped ZnO nanocrystals. Multiple emission bands were observed for pristine and doped ZnO samples where, 401 nm emission band corresponds to a contribution due to free excitons recombination through an exciton–exciton collisions. With the Ce addition, the surface defects increases and the emission intensity decreases.
Databáze: OpenAIRE
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