Issue 26, 2015

Optically stimulated persistent luminescence of europium-doped LaAlO3 nanocrystals

Abstract

Optically stimulated persistent luminescence was investigated for europium-doped LaAlO3 nanocrystals. This system shows conventional luminescence of both the Eu3+ line emission and the weak broad-band emission of Eu2+ upon UV excitation. The persistent luminescence is predominantly associated with the Eu3+ emission, and can be amplified significantly through irradiation with IR at 975 nm. The conventional luminescence from Eu3+ is strongly enhanced when the material is excited simultaneously with both UV and IR radiation. The enhancement of persistent luminescence is accompanied by increased persistent photoconductivity. The charge transfer band of the LaAlO3:Eu3+ nanocrystals in the UV excitation spectra significantly weakens with increasing IR excitation power, also correlating well with the enhancement of persistent luminescence. Finally, a mechanism is presented for the optically stimulated and persistent luminescence in this Eu2+- and Eu3+-doped LaAlO3 material.

Graphical abstract: Optically stimulated persistent luminescence of europium-doped LaAlO3 nanocrystals

Article information

Article type
Paper
Submitted
15 Jan 2015
Accepted
18 May 2015
First published
27 May 2015

Phys. Chem. Chem. Phys., 2015,17, 17246-17252

Author version available

Optically stimulated persistent luminescence of europium-doped LaAlO3 nanocrystals

P. Głuchowski, W. Stręk, M. Lastusaari and J. Hölsä, Phys. Chem. Chem. Phys., 2015, 17, 17246 DOI: 10.1039/C5CP00234F

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