Growth and spectroscopic properties of CaxSr1-xF2: Sm: Gd single crystals

Xu, Chonglei; Strzęp, Adam; Zhang, Zhonghan; Kou, Huamin; Ma, Fengkai; Su, Liangbi

doi:10.1016/j.jlumin.2022.119008

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…In the case of Gd 3+ ions being excited, electro According to Table 2, the order of radius difference between Ln 3+ ions and La 3+ ion is D r (Sc 3+ ) > D r (Y 3+ ) > D r (Gd 3+ ), so the Sc 3+ ions co-doped phosphors should have the strongest gain effect. However, the results indicate that the gain effect of Ln 3+ ions on phosphors is Gd 3+ > Sc 3+ > Y 3+ , which could be explained by the energy transfer between Gd 3+ and Sm 3+ ions [44,45].…”

Section: Lamentioning

confidence: 86%

A Novel Zero-Thermal-Quenching Red Phosphor with High Quantum Efficiency and Color Purity

Zhao,

Zhang,

Zhu

2023

Inorganics

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In this paper, a series of K5La1-x(MoO4)4: xSm3+ and K5La0.86(MoO4)4: 0.07Sm3+, 0.07Ln3+ (Ln = Sc, Y or Gd) red phosphors were prepared by calcining the mixed raw powders at 600 °C. Meanwhile, the composition and fluorescence properties of the phosphors, especially for the thermal stability, were analyzed in detail. The results indicate that the K5La1-x(MoO4)4: xSm3+ phosphors can be effectively excited at 401 nm and emit red light with three main peaks at 561 nm, 600 nm and 646 nm, attributed to the 4G5/2→6Hj/2 (j = 5, 7 and 9) energy transitions of the Sm3+ ion respectively, among which the K5La0.93(MoO4)4: 0.07Sm3+ exhibits the highest intensity. The quenching mechanism is ascribed to the dipole-dipole interaction. Ln3+ co-doping does not change the shape and peaking position of the excitation and emission spectra of K5La0.93(MoO4)4: 0.07Sm3+, but further increases the emission intensity in different degrees. Particularly, K5La0.86(MoO4)4: 0.07Sm3+, 0.07Gd3+ demonstrates a high quantum efficiency of 74.63%, a low color temperature (1753 K), and a high color purity of up to 99.97%. It is worth noting that all the phosphors have a good thermal stability, even a zero quenching phenomenon occurs, attributed to the electron traps confirmed by the TL spectrum.

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Section: Lamentioning

confidence: 86%

A Novel Zero-Thermal-Quenching Red Phosphor with High Quantum Efficiency and Color Purity

Zhao,

Zhang,

Zhu

2023

Inorganics

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Effects of temperature on factors relevant to laser operation near 1.6 µm wavelength in resonantly (in-band) pumped CaF2:Er and SrF2:Er crystals: a comparative study

et al. 2023

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Single crystals of CaF2 and SrF2 containing Er3+ ions with concentrations between 0.01 and 0.6 at% respectively, were grown using the temperature gradient technique (TGT). Absorption spectra related to the 4I15/2 → 4I13/2 transition of Er3+ ions were measured at 5 K to investigate the properties of the crystal field splitting of the 4I13/2 multiplet, and at several temperatures in the region 80 K – 300 K to determine the effect of temperature on the spectral bands. The 4I13/2 → 4I15/2 luminescence spectra were recorded within the same temperature range as for absorption measurement. The analysis of absorption and luminescence spectra provides an in-depth knowledge on the effect of temperature on the factors that govern the efficiency of resonant optical pumping near 1.6 µm and the resulting lasing ability of Er3+ ions imbedded in CaF2 and SrF2 hosts.

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Fabrication of sub-micrometer sized Er:CaF2 transparent ceramics for eye-safe lasers

et al. 2022

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Growth and spectroscopic properties of CaxSr1-xF2: Sm: Gd single crystals

Cited by 3 publications

References 37 publications

A Novel Zero-Thermal-Quenching Red Phosphor with High Quantum Efficiency and Color Purity

A Novel Zero-Thermal-Quenching Red Phosphor with High Quantum Efficiency and Color Purity

Effects of temperature on factors relevant to laser operation near 1.6 µm wavelength in resonantly (in-band) pumped CaF2:Er and SrF2:Er crystals: a comparative study

Fabrication of sub-micrometer sized Er:CaF2 transparent ceramics for eye-safe lasers

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