Open AccessSynthesis of dye‐loaded NaYF 4 :Yb, Er superparticles for tunable upconversion emissions
Author(s) -
You Huiling,
Xie Jianjian,
Bao Longyi,
Qiao Ru,
Zhang Yong,
Li Zhengquan
Publication year - 2015
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2014.0471
Subject(s) - photon upconversion , nanocrystal , fluorescence , materials science , optoelectronics , nanotechnology , optics , physics , doping
Spherical superparticles consisting of small NaYF 4 :Yb, Er nanocrystals are developed with an emulsion method. Within each superparticle, many individual upconversion nanocrystals are condensed together and lots of small vacancies are simultaneously produced because of the packing of primary nanocrystals. Through the loading fluorescent dyes inside the vacancies of these superparticles during assembly, one can fine‐tune the upconversion fluorescence of these superparticles. Nearly single‐band red upconversion emission can also be achieved by loading suitable amounts of dyes in these superparticles.