Photoluminescence properties of rare-earth ions-activated Sr2YF7 nanoparticles for WLED devices

The series of rare-earth (RE) ions-activated Sr2YF7 nanoparticles were successfully synthesized at room temperature. The phase structure, elemental composition, morphology, and photoluminescence performances were investigated in detail. The optimal Sr2YF7:xEu3+ was found to be x = 0.3 mol. Additiona...

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Bibliographic Details
Published in:Ceramics international 2020-12, Vol.46 (17), p.26646-26659
Main Authors: Hua, Yongbin, Yu, Jae Su
Format: Article
Language:English
Subjects:
Chromaticity coordinates
Energy transfer
Thermal stability
WLEDs
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Summary:The series of rare-earth (RE) ions-activated Sr2YF7 nanoparticles were successfully synthesized at room temperature. The phase structure, elemental composition, morphology, and photoluminescence performances were investigated in detail. The optimal Sr2YF7:xEu3+ was found to be x = 0.3 mol. Additionally, the Eu3+-activated Sr2YF7:Dy3+ nanoparticles emitted warm white light and the valid energy transfer (ET) efficiency in Sr2YF7:Dy3+/Eu3+ nanoparticles was approximately 79.77%. Meanwhile, the Eu3+-activated Sr2YF7:Tb3+ nanoparticles could emit near-warm white light with excellent ET efficiency (97.78%). Besides, the concentration quenching mechanism and thermal stability of the resultant samples were analyzed. Eventually, the white lighting-emitting diodes based on the resultant samples were fabricated, exhibiting good color rendering index and correlated color temperature values.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2020.07.134