Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 47, 2013
Previous Article Next Article

Tunable trap depth in Zn(Ga1−xAlx)2O4:Cr,Bi red persistent phosphors: considerations of high-temperature persistent luminescence and photostimulated persistent luminescence

Author affiliations

Abstract

Thermoluminescence peaks for Cr3+ emissions shift to higher temperature due to the partial substitution of Al for Ga sites in ZnGa2O4:Cr,Bi phosphors, which indicates that the electron traps responsible for the red persistent luminescence are tuned to deeper levels by Al-doping. Al-containing phosphors with deeper traps showed a lower persistent luminescence intensity than Al-free samples at 20 °C because the ambient thermal energy is too low to release trapped electrons in deeper levels; however, the Al-containing persistent phosphors perform better at 80 °C with greater thermal energy. At 20 °C, the trapped electrons in the Al-containing phosphors can be efficiently released with the assistance of additional NIR photostimulation. NIR photostimulated red persistent luminescence (NIR-to-red mode) as presented in the Al-containing ZnGa2O4:Cr,Bi phosphors could be a promising technique for new in vivo imaging systems.

Graphical abstract: Tunable trap depth in Zn(Ga1−xAlx)2O4:Cr,Bi red persistent phosphors: considerations of high-temperature persistent luminescence and photostimulated persistent luminescence

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Jul 2013, accepted on 03 Oct 2013 and first published on 07 Oct 2013


Article type: Paper
DOI: 10.1039/C3TC31462F
Citation: J. Mater. Chem. C, 2013,1, 7849-7855

  •   Request permissions

    Tunable trap depth in Zn(Ga1−xAlx)2O4:Cr,Bi red persistent phosphors: considerations of high-temperature persistent luminescence and photostimulated persistent luminescence

    Y. Zhuang, J. Ueda and S. Tanabe, J. Mater. Chem. C, 2013, 1, 7849
    DOI: 10.1039/C3TC31462F

Search articles by author

Spotlight

Advertisements