Jump to main content
Jump to site search

Issue 34, 2015
Previous Article Next Article

Magnetic field modulated upconversion luminescence in NaYF4:Yb,Er nanoparticles

Author affiliations

Abstract

Upconversion, an anti-Stokes process that converts two or more lower energy photons into a higher energy photon, has been paid growing attention due to its wide range of applications ranging from photonics to bioscience. This process, however, suffers from poor efficiency which strongly hampers its application and commercialization. We show here that the upconversion luminescence of NaYF4:Yb,Er nanoparticles can be modulated by the magnetic field and an enhancement of upconversion intensity by a factor of 2.5 is obtained at 20 T. The increased upconversion luminescence is interpreted in terms of enhanced energy transfer from Yb3+ to Er3+ and the enhanced non-radiative transition from 4S3/2 to 4F9/2 and 4I11/2 to 4I13/2 of Er3+ ions. In addition, continuous spectral broadening and shift of f–f transitions with increasing magnetic field intensity are observed, which are ascribed to the Zeeman effect and the difference in the g factor of Zeeman levels. The results demonstrated here may open a new gate towards the modulation of the excited state process by the magnetic field.

Graphical abstract: Magnetic field modulated upconversion luminescence in NaYF4:Yb,Er nanoparticles

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 May 2015, accepted on 30 Jul 2015 and first published on 10 Aug 2015


Article type: Communication
DOI: 10.1039/C5TC01349F
Citation: J. Mater. Chem. C, 2015,3, 8794-8798
  •   Request permissions

    Magnetic field modulated upconversion luminescence in NaYF4:Yb,Er nanoparticles

    P. Chen, H. Jia, Z. Zhong, J. Han, Q. Guo, J. Zhou, X. Liu and J. Qiu, J. Mater. Chem. C, 2015, 3, 8794
    DOI: 10.1039/C5TC01349F

Search articles by author

Spotlight

Advertisements