Particle size dependence of the dynamic photophysical properties of NaYF_4:Yb, Er nanocrystals | Zendy

Shuang Fang Lim | Zendy; William S. Ryu | Zendy; Robert H. Austin | Zendy

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Particle size dependence of the dynamic photophysical properties of NaYF_4:Yb, Er nanocrystals

Author(s) -

Shuang Fang Lim,

William S. Ryu,

Robert H. Austin

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.002309

Subject(s) - nanocrystal , materials science , particle size , luminescence , surface area to volume ratio , hexagonal crystal system , nanotechnology , optics , optoelectronics , chemistry , crystallography , physics , thermodynamics

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.

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