Synthesis of dye-loaded NaYF4:Yb, Er superparticles for tunable upconversion emissions

Huiling You; Jianjian Xie; Longyi Bao; Ru Qiao; Yong Zhang; Zhengquan Li

Synthesis of dye-loaded NaYF₄:Yb, Er superparticles for tunable upconversion emissions

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Author(s): Huiling You ¹ ; Jianjian Xie ¹ ; Longyi Bao ² ; Ru Qiao ³ ; Yong Zhang ³ ; Zhengquan Li ^{1, 3}
- Affiliations: 1: Chuyang Honor College, Zhejiang Normal University, Jinhua, Zhejiang 321004, People's Republic of China;
  2: Department of Materials Physics, Zhejiang Normal University, Jinhua, Zhejiang 321004, People's Republic of China;
  3: Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, People's Republic of China
Source: Volume 10, Issue 3, March 2015, p. 144 – 146
DOI: 10.1049/mnl.2014.0471 , Online ISSN 1750-0443

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Received 20/09/2014, Accepted 15/10/2014, Revised 08/10/2014, Published 04/03/2015

Spherical superparticles consisting of small NaYF₄: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.

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Synthesis of dye-loaded NaYF₄:Yb, Er superparticles for tunable upconversion emissions

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