期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 509, 期 20, 页码 5942-5946出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.03.017
关键词
Lanthanide; Photoluminescence; Lattice parameters; Excitons; ZnO
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. Aparticle 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. (C) 2011 Elsevier B.V. All rights reserved.
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