Journal
JOURNAL OF LUMINESCENCE
Volume 241, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2021.118491
Keywords
CaO; CaCO3; Eu3+; Local structures; Luminescence properties
Categories
Funding
- National Natural Science Foundation of China [21671078]
- Openning Research Funds Projects of the State Key Laboratory of Inorganic Synthesis and Preparative Chemistry [2016-06]
- Jilin Province Science and Tech-nology Development Plan item [20170312002ZX]
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The CaO:Eu3+ phosphors prepared by calcination of CaCO3:Eu3+ nanoparticles exhibit advantages in terms of phase purity, crystallinity, particle size, and luminescence properties compared to those obtained by traditional high temperature solid-phase methods. The study also reveals that CaO:0.02Eu(3+) has a stronger Eu-O charge transfer band in the excitation spectrum, making it more suitable for deep ultraviolet excitation. Overall, the luminescent properties and local structure of CaO:xEu(3+) phosphors were investigated in detail.
CaO:Eu3+ phosphors were prepared by calcination of CaCO3:Eu3+ nanoparticles. The as-obtained samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), and photoluminescent (PL) techniques. The results reveal that the CaO:Eu3+ phosphors obtained by this method have significant advantages over those obtained by the traditional high temperature solid-phase method in terms of phase purity, crystallinity, particle size and luminescence properties. In addition, Eu3+ ions are also used as spectroscopic probe to analyse the relationship between the local crystal structure and the luminescence properties of CaCO3:Eu3+ and CaO:Eu3+. The study indicates that the excitation spectrum of CaO:0.02Eu(3+) have the stronger Eu-O charge transfer band (CTB) than that of CaCO3:0.02Eu(3+), which enhances the luminescence and makes it more suitable for deep ultraviolet excitation. Finally, the luminescent properties and local structure of CaO:xEu(3+) phosphors was also investigated.
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