Luminescent properties and energy transfer of Gd3+/Eu3+ co-doped cubic CaCO3

Sun, Ya; Zou, Haifeng; Zhang, Bowen; Zhou, Xiuqing; Song, Yanhua; Zheng, Keyan; Shi, Zhan; Ye, Sheng

doi:10.1016/j.jlumin.2016.06.009

Cited by 34 publications

(4 citation statements)

References 42 publications

(45 reference statements)

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“…The 394 nm absorption band is assigned to the transition of Eu 3+ : 7 F 0 → 5 L 6 , while the absorption band in the range of 200–275 nm is triggered by Eu 3+ ‐F − charge transfer. However, some absorption bands observed in other studies, such as Gd 3+ : 8 S 7/2 → 6 I 7/2 , do not appear because they are covered by the absorption of the host matrix or are located at the absorption edge [16,17] …”

Section: Resultsmentioning

confidence: 85%

“…6 I 7/2 , do not appear because they are covered by the absorption of the host matrix or are located at the absorption edge. [16,17] Figure 5 depicts the excitation spectra of 0.5 Eu 3 + , and 0.5 Eu 3 + /2.5 Gd 3 + co-doped Na 5 Lu 9 F 32 single crystals by detecting at 611 nm emission. The excitation spectra consist of two parts of wavelength.…”

Section: The Effects Of Gdf 3 On Luminescent Properties and Cie Coord...mentioning

confidence: 99%

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Enhanced Red Emission of Na₅Lu₉F₃₂: Eu³⁺ Single Crystal by Introducing of GdF₃

Zou,

Fang,

Zhou

et al. 2024

Eur J Inorg Chem

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The bulk Na5Lu9F32 single crystals with high quality Serial Eu3+/Gd3+ co‐doped were grown by an ameliorative Bridgman technique. The measurement of X‐ray diffraction (XRD) and analysis of Rietveld refinement were implemented to validate the crystal phase. The Eu3+ doped Na5Lu9F32 single crystal emits intense red emission at 611 nm excited by 394 nm light. The intensity of 1.8 mol% Gd3+ doped sample is boosted by 3.56 times compared with the un‐doped one. The doping of Gd3+ ions replace competitively Lu3+ lattice sites with Eu3+ ions. Thus, they cause the lattice distortion and reduction of symmetry, enabling Eu3+ ions to overcome their 4f forbidden transitions. The change of Eu3+ ion local environment induced by Gd3+ ion doping was explored by the Eu3+ emission spectra and the variations of ratios between red and orange emission intensities (R/O). The fluorescence lifetime indicate that the introduction of GdF3 decrease the probability of non‐radiative transitions and increases the fluorescence lifetime. These results demonstrated that the Na5Lu9F32: Eu3+ single crystal doped with an appropriate concentration of GdF3 is a type of promising red emission single crystal for related optical devices of detectors and laser due to its strong red emission, high transparency and high physico‐chemical stability.

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Section: Resultsmentioning

confidence: 85%

Section: The Effects Of Gdf 3 On Luminescent Properties and Cie Coord...mentioning

confidence: 99%

Enhanced Red Emission of Na₅Lu₉F₃₂: Eu³⁺ Single Crystal by Introducing of GdF₃

Zou,

Fang,

Zhou

et al. 2024

Eur J Inorg Chem

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“…LiYF 4 : Eu 3+ (0.1%) does not show emission. According to the literature data, the energy transfer from Gd 3+ to Eu 3+ occurs via quantum cutting [28] and energy transfer between suitable energy levels of Gd 3+ and Eu 3+ [29,30]. Quantum cutting can be described at the Gd 3+ excitation (λ ex = 202 nm ( 8 S 7/2 -6 G J absorption band of Gd 3+ )) as "cuts" into the excitation of the 5 D 0 level of Eu 3+ and 6 P J level of Gd 3+ .…”

Section: Spectral-kinetic Characterization Of the Ligd X Y 1−x F 4 Sa...mentioning

confidence: 99%

LiGdxY1−xF4 and LiGdF4:Eu3+ Microparticles as Potential Materials for Optical Temperature Sensing

Oleynikova,

Morozov,

Korableva

et al. 2024

Ceramics

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In this work, the physical characterization of LiGdxY1−xF4 (x = 0.05, 0.3, 0.7, and 1.0) and LiGdF4:Eu3+ microparticles was performed. The distribution coefficient of LiGdxY1−xF4 (x = 0.05) was determined for the first time (0.84). Based on kinetic characterization data, the LiGdF4 sample was chosen for further Eu3+ doping (0.1 and 1.0 at.%). For the LiGdF4:Eu3+ sample, Eu3+ emission was clearly observed under the excitation of Gd3+. This fact indicates an effective energy transfer from Gd3+ to Eu3+. The temperature-dependent spectral characterization of the LiGdF4:Eu3+ (1.0%) sample revealed that in the 30–250 K temperature range, a broad emission peak is evidenced. Its intensity sharply increases with the temperature decrease. We made a suggestion that this phenomenon is related to the irradiation-induced defects. The integrated luminescence intensity ratio of this broad peak and the Eu3+ emission were taken as temperature-dependent parameters. The sensitivity values are very competitive, and the first maximum occurs at 174 K (3.18%/K). The kinetic characteristics of both Gd3+ and Eu3+ did not demonstrate a notable temperature dependence. The LiGdF4:Eu3+ sample showed the possibility of being used as an optical temperature sensor, operating in the cryogenic temperature range.

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“…4f or 5d ! 4f transitions [13,14]. The Ce 3+ with the 4f 1 configuration in solids shows efficient broad band luminescence due to the 4f À 5d parity allowed electric dipole transition.…”

Section: Introductionmentioning

confidence: 99%