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: |
Lanthanide
Diffraction Photoluminescence Materials science Dopant Condensed Matter::Other Mechanical Engineering Exciton Doping Metals and Alloys Analytical chemistry Ion Condensed Matter::Materials Science Crystallography Mechanics of Materials X-ray crystallography Physics::Atomic and Molecular Clusters Materials Chemistry |
| 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 |
| Externí odkaz: |
|
Full Text from ScienceDirect