Dependence of morphology and photoluminescent properties of GdPO 4:Eu 3+ nanostructures on synthesis condition
Abstract
GdPO 4:Eu 3+ nanoparticles, nanowires and nanorods phosphors were successfully synthesized by a hydrothermal method. Their photoluminescent properties were investigated and compared. The results indicated that the one-dimensional nanowires and nanorods were formed as the pH value of precursor solution was 1, 5 and 9, while zero-dimensional nanoparticles were formed for the pH value of 9. The crystallization state of nanoparticles was relative lower and the crystal structure belongs to monoclinic phase for other samples. The charge transfer band (CTB) of Eu 3+ ions in nanorods (for pH value of 13) clearly blue-shifted in contrast with other samples. The integrate intensity ratio of 5D 0- 7F 2 to 5D 0- 7F 1 in nanoparticles increased due to high disorder. The lifetime of 5D 0 level of Eu 3+ in nanoparticles decreased in comparison with other samples and radiative transition rate of 5D 0- ∑J7FJ increased.
- Publication:
-
Chemical Physics
- Pub Date:
- August 2006
- DOI:
- 10.1016/j.chemphys.2006.03.008
- Bibcode:
- 2006CP....326..478Y
- Keywords:
-
- 78.67.Bf;
- 78.67.Lt;
- 78.55.-m;
- 71.10.Li;
- Nanocrystals and nanoparticles;
- Quantum wires;
- Photoluminescence properties and materials;
- Excited states and pairing interactions in model systems