期刊
JOURNAL OF LUMINESCENCE
卷 206, 期 -, 页码 509-517出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2018.10.087
关键词
Energy transfer; Electrospinning; White light emission; Paramagnetism; Gadolinium oxysulfide
类别
资金
- National Natural Science Foundation of China [51573023, 50972020]
- Natural Science Foundation of Jilin Province [20170101101JC]
- Industrial Technology Research and Development Project of Jilin Province Development and Reform Commission [2017C051]
- Science and Technology Research Planning Project of the Education Department of Jilin Province during the 13th Five-Year Plan Period [JJKH20170608KJ]
- Youth Foundation of Changchun University of Science and Technology [XQNJJ-2016-01]
Gd2O2S:Dy3+, Eu3+ nanofibers were successfully prepared via electrospinning combined with dual-boat sulfurization approach. X-ray diffractometer analysis reveals that Gd2O2S:Dy3+, Eu3+ nanofibers possess hexagonal structure (space group: P3(-)m1). The as-synthesized samples are apparently nanofibers in morphology with field emission scanning electron microscope investigation, and the average diameters of PVP/(Gd(NO3)(3) + Dy(NO3)(3) + Eu(NO3)(3)) electrospinning-produced nanofibers and Gd2O2S:Dy3+, Eu3+ nanofibers are 454.10 +/- 4.97 nm and 162.93 +/- 0.75 nm, respectively. Gd2O2S:Dy3+, Eu3+ nanofibers demonstrate the typical blue, yellow and weak red emission bands via the excitation of 268-nm ultraviolet. Resulted from the effective spectral overlap between Dy3+ and Eu3+, Dy(3+ )is proved to be the effective sensitizer for Eu3+, which leads to the energy transfer of Dy3+-> Eu3+ in Gd2O2S host and improved red emission of Eu3+. Further, the mechanism of energy transfer between Dy3+ and Eu3+ is determined to be an electric doublet-electric doublet interaction. Additionally, variable fluorescent color, including blue, red and especially white, can be achieved by properly modulating the ratios between Dy3+ and Eu3+. The formation mechanism of Gd2O2S:Dy3+, Eu3+ nanofibers is also advanced. Besides, the Gd2O2S:Dy3+, Eu3+ nanofibers display paramagnetism at ambient temperature. The as-synthesized Gd2O2S:Dy3+, Eu3+ nanofibers have applicable prospects in anti-fake, lasers, modulator, liquid crystal display, drug delivery and light emitting diodes (LEDs) due to their magnetism-photoluminescence dual-functionality.
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