Affiliation:
1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University Changchun 130012, P. R. China
2. College of Physics, Jilin University, Changchun 130012, P. R. China
Abstract
Monodisperse cubic NaYF4: 20%Yb, 2%Er nanoparticles (NPs) were successfully synthesized using the high-temperature thermal decomposition method. It is found that the crystal structure of NaYF4: 20%Yb, 2%Er, [Formula: see text]%Eu ([Formula: see text] 0, 2, 4) NPs changes from cubic to hexagonal phase with the increase in Eu[Formula: see text] concentration, and the upconversion (UC) luminescent intensities of green and red emissions were decreasing. The emission peaks of Eu[Formula: see text] ([Formula: see text] ([Formula: see text] 1, 2)) ions and the extra peaks of Er[Formula: see text] ([Formula: see text] ions at 450 nm are found, which suggests that the energy transfer between Er[Formula: see text] ions and Eu[Formula: see text] ions occurred with the near infrared light excitation. The probable mechanism related to the cubic-to-hexagonal phase transition of NaYF4 and energy transfer between Eu[Formula: see text] and Er[Formula: see text] ions or Yb[Formula: see text] ions are discussed.
Funder
Interdisciplinary Research Team of Jilin University
National Science Foundation of China
Publisher
World Scientific Pub Co Pte Ltd
Subject
General Materials Science
Cited by
3 articles.
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