Abstract
Lu3Al5O12:Ce3+ phosphor powder, which exhibits green emission band, was synthesized by the high-temperature solid-state reaction method with a flux BaF2. X-ray diffraction (XRD), photoluminescence (PL) spectra, and fluorescent lifetime spectra were used to characterize the structure and luminescent properties of the sample. The XRD patterns indicated that when prepared at 1550 °C for 3 h with 4 wt% flux, Lu3Al5O12:Ce3+ phosphors powder is the garnet cubic crystal system structure. Photoluminescence (PL) spectra showed that the Lu3Al5O12:Ce3+ phosphor powder can be effectively excited by near ultraviolet and blue light, emitting broad band peaking at 505 nm, which is attributed to 2F5/2 → 2D5/2 transition. The self-concentration quenching mechanism of Ce3+ is the dipole–dipole interaction. Small amount of Pr3+ increased red light emission at 610 nm. Photoluminescence (PL) spectra and fluorescent lifetime spectra indicated that there was an efficient energy transfer process between Ce3+ and Pr3+.
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Acknowledgements
This research was financially supported by the Scientific and Technological Department of Jilin Province (Nos. 20130522176JH and 20130102016JC), the National Natural Science Foundation of China (No. 61307118)and Changchun Science and Technology Bureau (No. 2013045).
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Zhang, H., Li, R. & Bai, Z. Luminescence properties and preparation of Lu3Al5O12 powder doped with Ce and Pr ions. J Mater Sci: Mater Electron 29, 10753–10761 (2018). https://doi.org/10.1007/s10854-018-9141-x
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DOI: https://doi.org/10.1007/s10854-018-9141-x