Vacuum Referred Binding Energy Scheme, Electron-Vibrational Interaction, and Energy Transfer Dynamics in BaMg<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>

Ln (Ce<sup>3+</sup>, Eu<sup>2+</sup>) Phosphors

Journal article (2018)

Authors

Ou Sun Yat-sen University
Zhou Sun Yat-sen University
Liu Sun Yat-sen University
Lin Sun Yat-sen University
Brik Jan Długosz University, University of Tartu, Chongqing University of Posts and Telecommunications
Dorenbos RST/Fundamental Aspects of Materials and Energy - AS
Tao Institute of High Energy Physics Chinese Academy of Science
Liang Sun Yat-sen University
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
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Published Date

2018

Language

English

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Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

The host structure and the synchrotron radiation VUV-UV luminescence properties of samples BaMg2Si2O7 (BMSO):Ln (Ce3+, Eu2+) at different doping levels and different temperatures were investigated in detail. Three important aspects are studied to elucidate the luminescence properties of samples: (1) the vacuum referred binding energy (VRBE) scheme is constructed with the electron binding in the BMSO host bands and in the Ce3+ and Eu2+ impurity levels with the aim to explain the different thermal stabilities of Ce3+ and Eu2+ emissions; (2) the electron-vibrational interaction analysis on the narrow Eu2+ emission indicates a weak electron-phonon interaction in the current case; (3) by using three models (Inokuti-Hirayama, Yokota-Tanimoto, and Burshteǐn models) at different conditions, the energy transfer dynamics between Ce3+ and Eu2+ was analyzed. It reveals that the energy transfer from Ce3+ to Eu2+ via electric dipole-dipole (EDD) interaction is dominant while energy migration between Ce3+ is negligible. Finally, the X-ray excited luminescence spectra of samples BMSO:Ce3+/Eu2+ are collected to evaluate their possible scintillator applications.