Preparation and Spectroscopic Properties of Pr³⁺-doped Transparent Glass-ceramic Containing LiYF₄ Nanocrystals

【摘要】 Pr³⁺-doped transparent oxyfluoride glass-ceramic containing tetragonal LiYF₄ nanocrystals has been synthesized by melting-quenching method and subsequent thermal treatment and spectroscopic properties of Pr³⁺ ions were investigated. The crystalline phase and microstructure of the LiYF₄ nanocrystals were studied by X-ray diffraction（XRD） and transmission electron microscopy（TEM）, respectively. Compared with those of Pr³⁺-doped glass(Pr³⁺:PG), the sharp absorption and emission bands of Pr³⁺-doped glass-ceramic(Pr³⁺:GC) reveal parts of Pr³⁺ ions are incorporated into LiYF₄ nanocrystals. The peak absorption cross-section at 443 nm（³H₄ → ³P₂） adds to 110% and the full width at half maximum（FWHM） for the band around 443 nm reduces from 22 to 14 nm after crystallization. The fluorescence lifetime of the ³P₀ multiplet of Pr³⁺ ions increases from 5.35 to 11.14 μs after crystallization. The results indicate that this glass-ceramic is promising to be a visible laser material.更多还原

【Abstract】 Pr³⁺-doped transparent oxyfluoride glass-ceramic containing tetragonal LiYF₄ nanocrystals has been synthesized by melting-quenching method and subsequent thermal treatment and spectroscopic properties of Pr³⁺ ions were investigated. The crystalline phase and microstructure of the LiYF₄ nanocrystals were studied by X-ray diffraction（XRD） and transmission electron microscopy（TEM）, respectively. Compared with those of Pr³⁺-doped glass(Pr³⁺:PG), the sharp absorption and emission bands of Pr³⁺-doped glass-ceramic(Pr³⁺:GC) reveal parts of Pr³⁺ ions are incorporated into LiYF₄ nanocrystals. The peak absorption cross-section at 443 nm（³H₄ → ³P₂） adds to 110% and the full width at half maximum（FWHM） for the band around 443 nm reduces from 22 to 14 nm after crystallization. The fluorescence lifetime of the ³P₀ multiplet of Pr³⁺ ions increases from 5.35 to 11.14 μs after crystallization. The results indicate that this glass-ceramic is promising to be a visible laser material.更多还原