Multicolor light emitters based on energy exchange between Tb and Eu ions co-doped into ultrasmall β-NaYF4 nanocrystals

Artur Podhorodecki; Mateusz Banski; Jan Misiewicz; Mohammad Afzaal; Paul O'Brien; Dongkyu Cha; Xianbin Wang

doi:10.1039/C2JM15785C

Multicolor light emitters based on energy exchange between Tb and Eu ions co-doped into ultrasmall β-NaYF₄ nanocrystals†

Artur Podhorodecki,*^a Mateusz Banski,^a Jan Misiewicz,^a Mohammad Afzaal,^b Paul O'Brien,^c Dongkyu Cha^d and Xianbin Wang^d

Author affiliations

* Corresponding authors

^a Institute of Physics, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, Wroclaw, Poland
E-mail: artur.p.podhorodecki@pwr.wroc.pl

^b Center of Research Excellence in Renewable Energy, King Fahd University of Petroleum and Minerals, PO Box 1292, Dhahran, Saudi Arabia
E-mail: afzaal@kfupm.edu.sa

^c The Manchester Materials Science Centre and The School of Chemistry, The University of Manchester, Oxford Road, Manchester, UK
E-mail: Paul.O'Brien@manchester.ac.uk

^d Advanced Nanofabrication, Imaging and Characterization Laboratory, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
E-mail: dongkyu.cha@kaust.edu.sa

Abstract

Multicolor emission is reported from ultrasmall (<10 nm) β-NaYF4:Eu,Tb nanocrystals depending on the excitation wavelengths or emission detection delay time. Detailed optical investigations of three samples (NaYF4:Eu, NaYF4:Tb and NaYF4:Eu,Tb) obtained by a co-thermolysis method have been carried out. Photoluminescence, photoluminescence excitation and emission decay time obtained at different excitation wavelengths have been measured. Excitation mechanisms of Eu and Tb ions have been explained based on the experimental results and calculations using Judd–Ofelt theory. It has been shown that efficient energy transfer from Tb to Eu ions accounts for the efficient red emission of NaYF4:Tb,Eu nanocrystals.

Supplementary files

Article information

DOI: https://doi.org/10.1039/C2JM15785C
Article type: Paper
Submitted: 10 Nov 2011
Accepted: 03 Jan 2012
First published: 06 Feb 2012

Download Citation

J. Mater. Chem., 2012,22, 5356-5361

Permissions

Request permissions

Multicolor light emitters based on energy exchange between Tb and Eu ions co-doped into ultrasmall β-NaYF₄ nanocrystals

A. Podhorodecki, M. Banski, J. Misiewicz, M. Afzaal, P. O'Brien, D. Cha and X. Wang, J. Mater. Chem., 2012, 22, 5356 DOI: 10.1039/C2JM15785C

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.

Journal of Materials Chemistry