beta-NaYF4 and beta-NaYF4:Eu3+ Microstructures: Morphology Control and Tunable Luminescence Properties


Autoria(s): Li CX; Zhang CM; Hou ZY; Wang LL; Quan ZW; Lian HZ; Lin J
Data(s)

2009

Resumo

beta-NaYF4 hexagonal microprisms and microrods with different aspect ratios have been prepared via a simple hydrothermal route. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and photoluminescence (PL) spectra as well as kinetic decays were used to characterize the samples. The influences of reaction temperature and the molar ratio of NaF to y(3+) on the crystal phases and shapes of final products have been studied in detail. The aspect ratios of products increase gradually with the increase of reaction temperature and NaF/Y3+ molar ratio. The growth mechanisms of crystals prepared under the different conditions are presented systematically. More importantly, the systematical investigation on the luminescence properties of beta-NaYF4:xEu(3+) (x = 0.5, 1, 2, 3, 5, and 10 mol %) with hexagonally microprismatic morphology shows the characteristic emissions of Eu3+ (D-5(J)-F-7(J'), J, J' = 0, 1, 2, 3). Under the excitation of single wavelength light of 397 nm, the luminescence colors of the corresponding products can be tuned feasibly from bluish white to yellow to red by changing the doping concentration of Eu3+.

Identificador

http://202.98.16.49/handle/322003/12023

http://www.irgrid.ac.cn/handle/1471x/148425

Idioma(s)

英语

Fonte

Li CX;Zhang CM;Hou ZY;Wang LL;Quan ZW;Lian HZ;Lin J.beta-NaYF4 and beta-NaYF4:Eu3+ Microstructures: Morphology Control and Tunable Luminescence Properties,JOURNAL OF PHYSICAL CHEMISTRY C ,2009,113(6):2332-2339

Palavras-Chave #RARE-EARTH IONS #HYDROTHERMAL SYNTHESIS #MULTICOLOR EMISSION #NAYF4 NANOCRYSTALS #NANOPARTICLES #PHOSPHORS #NANOSTRUCTURES #COLLOIDS #UNIFORM #SPHERES
Tipo

期刊论文