Radiation detection demands new scintillators with high quantum efficiency, high energy resolution and short luminescence lifetimes. Nanocomposites consisting of quantum dots and Ce3+ doped nanophosphors may be able to meet these requirements. Here we report the luminescence of LaF3:Ce/CdTe nanocomposites which were synthesized by a wet chemistry method. In LaF3:Ce/CdTe nanocomposites the CdTe quantum dots are converted into nanowires, while in LaF3/CdTe nanocomposites no such conversion is observed. The CdTe luminescence in LaF3:Ce/CdTe nanocomposites is enhanced about 5 times, while in LaF3/CdTe nanocomposites no enhancement was observed. Energy transfer, light-re-absorption and surface passivation are likely the reasons for the luminescence enhancement.
Revised: December 30, 2010 |
Published: November 15, 2010
Citation
Yao M., X. Zhang, L. Ma, W. Chen, A.G. Joly, J. Huang, and Q. Wang. 2010.Luminescence Enhancement of CdTe Nanostructures in LaF3:Ce/CdTe Nanocomposites.Journal of Applied Physics 108, no. 10:207-213.PNNL-SA-74942.doi:10.1063/1.3506416