Insight into Eu redox and Pr<sup>3+</sup> 5d emission in KSrPO<sub>4</sub> by VRBE scheme construction

Journal article (2018)

Authors

Zhou Zhou Sun Yat-sen University
Lin Lin Sun Yat-sen University
Liu Liu Sun Yat-sen University
Dorenbos Dorenbos RST/Fundamental Aspects of Materials and Energy - AS
Tao Tao Institute of High Energy Physics Chinese Academy of Science
Huang Huang Institute of High Energy Physics Chinese Academy of Science
Liang Liang Sun Yat-sen University
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Copyright: © 2018 Rongfu Zhou, Litian Lin, Chunmeng Liu, P. Dorenbos, Ye Tao, Yan Huang, Hongbin Liang
DOI: https://doi.org/10.1039/c7dt03813e
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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

A series of Ln-doped KSrPO4 (Ln = Ce3+, Eu3+, Eu2+, Pr3+) phosphors are prepared through a high-temperature solid-state method. The KSrPO4 compound is confirmed to possess a β-K2SO4 structure with the Pnma group by Rietveld refinement, and the temperature-dependent lattice parameters are investigated with the powder X-ray diffraction results at different temperatures. Ce3+ and Eu3+ ions are introduced to probe the crystal field strength (CFS) and the lanthanide site symmetry by using VUV-UV-vis spectroscopy. The temperature-dependent luminescence properties of KSrPO4: Ce3+/Eu2+ exhibit an excellent thermal stability of Ce3+/Eu2+ luminescence. Based on the VUV-UV-vis spectra of Ce3+ and Eu3+ doped KSrPO4, the vacuum referred binding energy (VRBE) scheme is constructed to understand the redox properties of Eu, the 5d energy levels of Pr3+ and the thermal quenching characteristics of Ce3+ and Eu2+ luminescence.

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