In:
CrystEngComm, Royal Society of Chemistry (RSC), Vol. 24, No. 42 ( 2022), p. 7412-7419
Abstract:
A series of high quality x %Pr 3+ :BaF 2 ( x = 0.6, 1, 2); (1%Pr 3+ , 2%Na + ):BaF 2 ; (1%Pr 3+ , y %Ca 2+ ):BaF 2 ( y = 3, 5) and (0.6%Pr 3+ , 10%R 3+ ):BaF 2 (R = Y, Lu, Gd) crystals were grown by temperature gradient technique (TGT). The Raman spectra, absorption spectra, fluorescence spectra, and fluorescence decay lifetime were measured. XRD patterns indicate that the as-synthesized samples are pure BaF 2 phase. The absorption cross-section of Pr 3+ ions in the BaF 2 matrix can be greatly improved by co-doping R 3+ ions, while improvement by Na + and Ca 2+ ions is marginal. The fluorescence characteristic of Pr 3+ ions can be effectively regulated by co-doping Na + , Ca 2+ , R 3+ (R = Y, Lu, Gd) ions of different valence states. When R 3+ ions are introduced, the fluorescence spectra show the strongest orange emission and the CIE chromaticity coordinates of Pr 3+ ions are also in the orange region. When single-doped Pr 3+ ions and Na + or Ca 2+ ions are introduced, the fluorescence lifetime of the 3 P 0 level is double exponential decay, and the short lifetime is the main proportion. However, the fluorescence centers tend to homogeneous and stable by R 3+ ions co-doping and the fluorescence lifetime exhibits single-exponential decay, which is fitted to 49.7 μs, 47.8 μs and 49.6 μs of (0.6%Pr 3+ , 10%R 3+ ):BaF 2 (R = Y, Lu, Gd), respectively. All the results show that (Pr 3+ , Gd 3+ ):BaF 2 and (Pr 3+ , Na + ):BaF 2 are excellent laser gain media for high-efficiency orange and red laser operation.
Type of Medium:
Online Resource
ISSN:
1466-8033
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2025075-7
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