The effect of annealing on spectral characteristics of the Ti doped MgAl2O4 crystal

Sun, Guangming; Zhang, Q.L.; Luo, Jianqiao; Li, L.C.; Deng, Zhihan; Zhang, R.G.

doi:10.1016/j.jlumin.2021.117956

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…[43][44][45] In addition, the Tidoped samples had no additional absorption bands such as 2 T 2 -2 E transitions of Ti 3+ in the range of 400-500 nm. 46,47) Thus, most of the doped Ti was considered to be substituted as Ti 4+ , and the absorption edge was derived from Ti.…”

Section: Resultsmentioning

confidence: 99%

“…Luminescence related to Ti 4+ appears between 400 and 500 nm because luminescence centers are affected by crystal symmetry and structure. [35][36][37] Quantum efficiency of PMTs depends on the emission wavelength, and bluish luminescence is suitable for the common PMTs. In addition, the decay time constant is approximately a few microseconds in some materials, 30) and these values are applicable for photon-counting type measurement.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Ti doping on scintillation properties of CaZrO₃ single crystals

Fukushima

Nakauchi

Kato

et al. 2022

Jpn. J. Appl. Phys.

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The Ti-doped CaZrO3 single crystals were successfully synthesized. All the samples exhibited a high transmittance up to 80% and an absorption edge derived from the doped Ti. Both the photoluminescence (PL) and scintillation spectra revealed a broad emission band. The PL and scintillation decay curves had two emission components, and these decay time constants were less than 1 μs. All the Ti-doped samples exhibited clear photoabsorption peaks, and the light yield of 1370 photons MeV−1 was obtained in the 1% Ti-doped sample.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Ti doping on scintillation properties of CaZrO₃ single crystals

Fukushima

Nakauchi

Kato

et al. 2022

Jpn. J. Appl. Phys.

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“…Phase-diagrams at both regions are listed together by Levin et al 7 While MgAl 2 O 4 crystals are excellent substrates for impurity-doped phosphors, challenges persist concerning their composition, electric charges of impurities, and crystal sites. [1][2][3][4][8][9][10][11][12][13][14][15][16][17][18][19][20] Many studies have delved into the properties of phosphors, such as Cr-doped MgAl 2 O 4 , [9][10][11][12] Ti-doped MgAl 2 O 4 , [13][14][15][16] and Mn-doped MgAl 2 O 4 . [17][18][19][20] However, few reports exist on crystal growth and comprehensive assessment of PL from Fe-doped MgAl 2 O 4 .…”

mentioning

confidence: 99%

Red Photoluminescence from Fe-Doped MgAl₂O₄ Crystals

Hitomi,

Mori,

Watanabe

et al. 2024

ECS J. Solid State Sci. Technol.

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The influence of variations in composition (x = MgO/Al2O3 = 0.3–1.0), Fe2O3 concentrations (0.05 mol%–2.0 mol%), and O2 concentrations (100 vol% and 0 vol%) in the atmosphere on the PL characteristics of Fe-doped MgAl2O4 crystals were investigated using single phase spinel crystals grown by FZ technique. The peak wavelength shift of photoluminescence at around 730 nm are observed depending on the Fe2O3 concentration and composition. Concentration quenching of red PL occurred at Fe2O3 concentration above 0.1 mol%. PL intensity was higher in samples grown in 100 vol% O2 compared to those grown in 100 vol% Ar. PL intensity from Fe-doped MgAl2O4 increased with increasing compositions x from 0.3 to 1.0. MgAl2O4 doped with 0.1 mol% Fe2O3, and a stoichiometric composition (x = 1.0) grown in 100 vol% O2, demonstrated strong red PL with ultraviolet-C (UVC) lights excitation.

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