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Journal of Nanomaterials
Volume 2019, Article ID 3928526, 9 pages
https://doi.org/10.1155/2019/3928526
Research Article

Facile Synthesis of Yb3+- and Er3+-Codoped LiGdF4 Colloidal Nanocrystals with High-Quality Upconversion Luminescence

Lu Zi,1 Dan Zhang,1 and Gejihu De1,2,3

1College of Chemistry and Environment Science, Inner Mongolia Normal University, Hohhot 010022, China
2Physics and Chemistry of Functional Materials, Inner Mongolia Key Laboratory, Hohhot 010022, China
3State Key Laboratory on Integrated Optoelectronics, Jilin University, Changchun 130012, China

Correspondence should be addressed to Gejihu De; nc.ude.unmi@hjged

Received 29 December 2018; Revised 14 March 2019; Accepted 14 April 2019; Published 16 May 2019

Academic Editor: Hiromasa Nishikiori

Copyright © 2019 Lu Zi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Herein, we synthesized high-quality colloidal nanocrystals of Yb3+/Er3+-codoped LiGdF4 with intense green emission by using a facile route and turning the associated reaction parameters. Moreover, we probed the effects of reaction conditions on nanocrystal properties (crystal structure, morphology, and luminescence) and gained valuable mechanistic insights into nucleation and growth processes. Sample purity was found to depend on LiOH·H2O concentration, reaction temperature, and time, which allowed us to manipulate sample purity and thus obtain species ranging from mixtures of LiGdF4:Yb3+/Er3+ with GdF3 to pure tetragonal-phase LiGdF4:Yb3+/Er3+. Investigation of upconversion luminescence properties and the luminescence lifetime of as-prepared samples revealed that LiGdF4 is a promising host material for realizing the desired upconversion luminescence.