Issue 39, 2020

Excitation efficiency determines the upconversion luminescence intensity of β-NaYF4:Er3+,Yb3+ nanoparticles in magnetic fields up to 70 T

Abstract

Lanthanide-doped nanoparticles enable conversion of near-infrared photons to visible ones. This property is envisioned as a basis of a broad range of applications: from optoelectronics, via energy conversion, to bio-sensing and phototherapy. The spectrum of applications can be extended if magnetooptical properties of lanthanide dopants are well understood. However, at present, there are many conflicting reports on the influence of the magnetic field on the upconverted luminescence. In this work, we resolve this discrepancy by performing a comprehensive study of β-NaYF4:Er3+,Yb3+ nanoparticles. Crucially, we show that the magnetic field impacts the luminescence only via a Zeeman-driven detuning between the excitation laser and the absorption transition. On the other hand, the energy transfer and multiphonon relaxation rates are unaffected. We propose a phenomenological model, which qualitatively reproduces the experimental results. The presented results are expected to lead to design of novel, dual-mode opto-magnetic upconverting nanomaterials.

Graphical abstract: Excitation efficiency determines the upconversion luminescence intensity of β-NaYF4:Er3+,Yb3+ nanoparticles in magnetic fields up to 70 T

Supplementary files

Article information

Article type
Paper
Submitted
03 Jūn. 2020
Accepted
20 Sept. 2020
First published
21 Sept. 2020

Nanoscale, 2020,12, 20300-20307

Excitation efficiency determines the upconversion luminescence intensity of β-NaYF4:Er3+,Yb3+ nanoparticles in magnetic fields up to 70 T

A. Borodziuk, M. Baranowski, T. Wojciechowski, R. Minikayev, B. Sikora, D. K. Maude, P. Plochocka and Ł. Kłopotowski, Nanoscale, 2020, 12, 20300 DOI: 10.1039/D0NR04252H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements