Tunable luminescent properties of BaGd2 O4 :Eu3+ scintillating phosphors by Pr3+ -codoping
Autor: | Lu-Nong Li, Shen-Lin Zhou, Shou-Bao Zhu, Fen Xiao, Xin-Yuan Sun |
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Rok vydání: | 2018 |
Předmět: |
Materials science
Photoluminescence Praseodymium Biophysics Analytical chemistry chemistry.chemical_element Phosphor 02 engineering and technology Radioluminescence 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Thermoluminescence 0104 chemical sciences Ion chemistry Chemistry (miscellaneous) 0210 nano-technology Luminescence Europium |
Zdroj: | Luminescence. 33:1432-1437 |
ISSN: | 1522-7235 |
Popis: | BaGd2 O4 :Eu3+ scintillating phosphors by Pr3+ -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 (Eu3+ ) without any praseodymium (Pr3+ ) ions, and the PL and RL intensities as well as the lifetimes of BaGd2 O4 :Eu3+ scintillating phosphors decrease dramatically with an increasing concentration of Pr3+ ions. Finally, the TL spectra reveal the trap concentration of the existing defects decrease with an increasing concentration of Pr3+ ions, while the relative TL intensity ratio of the high temperature band to the low temperature one increases with an increasing concentration of Pr3+ ions, which results in the afterglow suppression of BaGd2 O4 :Eu3+ scintillating phosphors. |
Databáze: | OpenAIRE |
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