Open AccessIon-redistribution induced efficient upconversion in β-NaYF_4:20%Yb^3+,2%Er^3+ microcrystals with well controlled morphology and size
Author(s) -
Shuzhen Fan,
Shikai Wang,
Lu Yu,
Haijie Sun,
Guojun Gao,
Lili Hu
Publication year - 2017
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.25.000180
Subject(s) - photon upconversion , redistribution (election) , ion , materials science , ion exchange , hydrothermal circulation , optoelectronics , optics , chemical engineering , chemistry , doping , physics , organic chemistry , politics , political science , law , engineering
We develop an efficient green upconversion (UC) β-NaYF 4 :20%Yb 3+ ,2%Er 3+ microcrystal with well controlled morphology and size by hydrothermal method using two different chelating agents of CIT and EDTA-2Na via a simple ion-exchange reaction. Importantly, the UC emission efficiency of newly developed CIT and EDTA-2Na β-NaYF 4 :20%Yb 3+ ,2%Er 3+ microcrystals is almost as strong as that of commercial counterpart by solid-state method. A proof-of-concept β-NaYF 4 :20%Yb 3+ ,2%Er 3+ microcrystal waveguide is demonstrated to extend their applications in modern micro-optoelectronics. The local ion-redistribution process during the ion-exchange reaction, which effectively disperses the locally clustered Yb 3+ , accounts for the enormously enhanced UC emission in β-NaYF 4 :20%Yb 3+ ,2%Er 3+ microcrystals.