Particle size dependence of the dynamic photophysical properties of NaYF4:Yb, Er nanocrystals.
The effects of the nanocrystal size on the emission spectra and decay rates of upconverting hexagonal NaYF(4):Yb,Er nanocrystals are investigated. The influence of nanocrystal size is represented in terms of the surface area/volume ratio (SA/Vol). Our results show that a small nanocrystal size, or large SA/Vol ratio increases the decay rate, in particular, the green luminescence decay rate varies linearly with the SA/Vol ratio.
Lim
Shuang Fang
SF
Dept of MAE, Princeton University, Princeton, NJ 08544, USA. sflim@ncsu.edu
Ryu
William S
WS
Austin
Robert H
RH