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Tunable luminescent properties of BaGd 2 O 4 :Eu 3+ scintillating phosphors by Pr 3+ ‐codoping
Author(s) -
Sun XinYuan,
Zhu ShouBao,
Xiao Fen,
Zhou ShenLin,
Li Lug
Publication year - 2018
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3569
Subject(s) - phosphor , radioluminescence , photoluminescence , thermoluminescence , ion , europium , analytical chemistry (journal) , materials science , luminescence , praseodymium , excited state , spectral line , emission spectrum , afterglow , chemistry , scintillator , atomic physics , physics , optics , optoelectronics , organic chemistry , gamma ray burst , chromatography , astronomy , detector , metallurgy
BaGd 2 O 4 :Eu 3+ scintillating phosphors by Pr 3+ ‐codoping were synthesized at 1300°C in air using a solid‐state reaction method. The as‐synthesized phosphors were characterized by X‐ray diffraction (XRD), photoluminescence (PL) including excitation and emission spectra, radioluminescence (RL) spectra excited by X‐ray and thermoluminescence (TL) spectra. Both the PL and RL spectra are composed of the featured trivalent europium (Eu 3+ ) without any praseodymium (Pr 3+ ) ions, and the PL and RL intensities as well as the lifetimes of BaGd 2 O 4 :Eu 3+ scintillating phosphors decrease dramatically with an increasing concentration of Pr 3+ ions. Finally, the TL spectra reveal the trap concentration of the existing defects decrease with an increasing concentration of Pr 3+ ions, while the relative TL intensity ratio of the high temperature band to the low temperature one increases with an increasing concentration of Pr 3+ ions, which results in the afterglow suppression of BaGd 2 O 4 :Eu 3+ scintillating phosphors.