Issue 34, 2014

Multi-color emission evolution and energy transfer behavior of La3GaGe5O16:Tb3+,Eu3+ phosphors

Abstract

A series of color-tunable green-red emitting La3GaGe5O16:Tb3+,Eu3+ phosphors were prepared by a high temperature solid-state reaction, and their phase structure and photoluminescence (PL) properties were investigated in detail. A series of characteristic emission lines originated from the f–f transitions of Tb3+ and Eu3+ can be observed from the PL spectra and the emission intensities' variation of the two strong emission lines peaking at around 544 nm (green) and 617 nm (red) induced the multi-color emission evolution via the fine tuning of the Tb3+/Eu3+ content ratio. The energy transfer process between Tb3+ and Eu3+ was demonstrated to be a resonant type via a dipole–dipole mechanism, and the crystal distance Rc calculated by the quenching concentration method and the spectral overlap method was 15.24 and 17.32 Å, respectively. Thermal quenching luminescence results reveal that La3GaGe5O16:Tb3+,Eu3+ exhibits good thermal stability.

Graphical abstract: Multi-color emission evolution and energy transfer behavior of La3GaGe5O16:Tb3+,Eu3+ phosphors

Article information

Article type
Paper
Submitted
25 may. 2014
Accepted
24 jun. 2014
First published
25 jun. 2014

J. Mater. Chem. C, 2014,2, 6978-6984

Author version available

Multi-color emission evolution and energy transfer behavior of La3GaGe5O16:Tb3+,Eu3+ phosphors

J. Zhou and Z. Xia, J. Mater. Chem. C, 2014, 2, 6978 DOI: 10.1039/C4TC01091D

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