The Effect of Sr<sup>2+</sup> on Luminescence of Ce<sup>3+</sup>-Doped (Ca,Sr)<sub>2</sub>Al<sub>2</sub>SiO<sub>7</sub>

Journal article (2017)

Authors

Lin Lin Sun Yat-sen University
Shi Shi Sun Yat-sen University
Zhou Zhou Sun Yat-sen University
Peng Peng Sun Yat-sen University
Liu Liu Sun Yat-sen University
Tao Tao Institute of High Energy Physics Chinese Academy of Science
Huang Huang Institute of High Energy Physics Chinese Academy of Science
Dorenbos Dorenbos RST/Fundamental Aspects of Materials and Energy - AS
Liang Liang Sun Yat-sen University
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
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Published Date

16-10-2017

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

A series of Ce3+-doped (Ca,Sr)2Al2SiO7 phosphors with different Ce3+ and Ca2+/Sr2+ concentrations were prepared by a high temperature solid-state reaction technique. To get insight into the structure-luminescence relationship, the impact of incorporation of Sr2+ on structure of (Ca,Sr)2Al2SiO7 was first investigated via Rietveld refinement of high quality X-ray diffraction (XRD) data, and then the VUV-UV excitation and UV-vis emission spectra of (Ca,Sr)2Al2SiO7:Ce3+ were collected at low temperature. The results reveal that the crystal structure evolution of (Ca,Sr)2Al2SiO7:Ce3+ has influences on band gaps and Ce3+ luminescence properties including 4f-5di (i = 1-5) transition energies, radiative lifetime, emission intensity, quantum efficiency, and thermal stability. Moreover, the influence of Sr2+ content on the energy of Eu3+-O2- charge-transfer states (CTS) in (Ca,Sr)2Al2SiO7:Eu3+ was studied in order to construct vacuum referred binding energy (VRBE) schemes with the aim to further understand the luminescence properties of (Ca,Sr)2Al2SiO7:Ce3+. Finally, X-ray excited luminescence (XEL) spectra were measured to evaluate the possibility of (Ca,Sr)2Al2SiO7:Ce3+ as a scintillation material.