Synthesis and luminescence of ZnMgS:Mn2+ nanoparticles.
J Nanosci Nanotechnol
; 5(9): 1465-71, 2005 Sep.
Article
em En
| MEDLINE
| ID: mdl-16193959
ABSTRACT
Efficient green emission from ZnMgSMn2+ nanoparticles prepared by co-doping Mg2+ and Mn2+ ions into ZnS lattices has been observed. The synthesis is carried out in aqueous solution, followed by a post-annealing process, thus showing the features of less complexity, low cost, and easy incorporation of dopants. In comparison with the emission of ZnSMn2+ nanoparticles, which is located generally around 590 nm, the photoluminescence of ZnMgSMn2+ nanoparticles is blue-shifted by 14 nm in wavelength, leading to the enhanced green emission. The X-ray diffraction, electron spin resonance, and pressure dependent photoluminescence measurements suggest that the change of the crystal field caused by Mg2+ ionic doping and the lower symmetry in the nanoparticles may account for the blue-shift of the photoluminescence. The ZnMgSMn2+ nanoparticles with 1% Mn2+ doping exhibit the strongest luminescence, which could potentially meet the requirements for the construction of green light emitting diodes.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sulfetos
/
Compostos de Zinco
/
Cristalização
/
Luminescência
/
Nanoestruturas
/
Magnésio
/
Manganês
Tipo de estudo:
Evaluation_studies
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article