Issue 25, 2015

Persistent luminescence from Eu3+ in SnO2 nanoparticles

Abstract

Persistent luminescence phosphors, which are capable of emitting light for a long time after ceasing excitation, have shown great promise in diverse areas as bioprobes, lighting and displays. Exploring new materials to realize efficient persistent luminescence is a goal of general concern. Herein, we report a novel persistent luminescence phosphor based on Eu3+-doped SnO2 nanoparticles (NPs). The afterglow decay behaviour, the trap depth distribution as well as the underlying mechanism for persistent luminescence of the NPs were comprehensively surveyed by means of thermoluminescence and temperature-dependent afterglow decay measurements. It was found that the thermal activation mechanism is responsible for the afterglow decay of the NPs with an inverse power-law exponent of 1.0 (or 1.7) in the temperature region below (or above) 220 K. In particular, the co-existence of uniform and exponential distributions in trap depths may result in such a unique afterglow decay behaviour. These results reveal the great potential of SnO2 NPs as an excellent host material for Eu3+ doping for the generation of efficient persistent luminescence.

Graphical abstract: Persistent luminescence from Eu3+ in SnO2 nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
27 Mar 2015
Accepted
21 May 2015
First published
21 May 2015

Nanoscale, 2015,7, 11048-11054

Persistent luminescence from Eu3+ in SnO2 nanoparticles

J. Kong, W. Zheng, Y. Liu, R. Li, E. Ma, H. Zhu and X. Chen, Nanoscale, 2015, 7, 11048 DOI: 10.1039/C5NR01961C

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