skip to main content

Title: Simultaneously optimizing fluorescent and paramagnetic properties of bifunctional NaGdF{sub 4}:Yb{sup 3+}/Er{sup 3+} nanocrystals by crystal field tuning

Graphical abstract: Crystal field tuning is a powerful approach for simultaneously enhancing the optical and magnetic properties of lanthanide-doped NaGdF{sub 4} bi-functional nanocrystals. - Abstract: Here, we show the simultaneous enhancement of fluorescent and paramagnetic properties in bifunctional NaGdF{sub 4}:Yb{sup 3+}/Er{sup 3+} nanocrystals by crystal field tuning. The energy level splitting calculation indicates, that lanthanide ionic pairs La{sup 3+}/Lu{sup 3+} introduced into the NaGdF{sub 4} host can modify the crystal field around emitters (e.g., Er{sup 3+} and Tm{sup 3+}) and sensitizers (e.g., Yb{sup 3+}) that result in the broadening of crystal field splitting of energy levels and the abundant multi-site distribution of upconversion luminescence. The optimization of the paramagnetic properties in NaGdF{sub 4} doped with emitters and sensitizers is ascribed to the lowering of anti-ferromagnetic coupling.
Authors:
;  [1] ;  [2] ;  [2]
  1. School of Information and Electrical Engineering, Hunan University of Science and Technology, Xiangtan 411201 (China)
  2. Department of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201 (China)
Publication Date:
OSTI Identifier:
22475711
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 64; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOY SYSTEMS; CRYSTAL FIELD; DOPED MATERIALS; ERBIUM ADDITIONS; FLUORESCENCE; FLUORIDES; FLUORINE COMPOUNDS; GADOLINIUM COMPOUNDS; LANTHANUM IONS; LUTETIUM IONS; MAGNETIC PROPERTIES; NANOSTRUCTURES; PARAMAGNETISM; SENSITIZERS; SODIUM COMPOUNDS; SYNTHESIS; THULIUM IONS; YTTERBIUM ADDITIONS