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Issue 6, 2018
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Enhanced 5D07F4 transition and optical thermometry of garnet type Ca3Ga2Ge3O12:Eu3+ phosphors

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Abstract

The garnet type phosphors of Eu3+ doped Ca3Ga2Ge3O12 were synthesized via conventional solid state reaction techniques. The phase purity and luminescence properties of the fabricated phosphors were characterized by X-ray powder diffraction, photoluminescence excitation and emission spectra, temperature dependent emission spectra as well as luminescence decay curves. The phosphors show enhanced red emission from a 5D07F4 transition of Eu3+ under the excitation of 394 nm. The unusual 5D07F4 intensity was explained by structural analysis. The emission intensity of the phosphors increases with the concentration of Eu3+ until the quenching concentration of 10 mol%. Excited by a pulsed laser of wavelength 610.8 nm, the emission intensity of the 5D07F4 transition increases monotonously as the temperature increases in the range of 160–360 K. The temperature dependent fluorescence behavior was investigated. The relative sensitivity reaches the maximum value of 3.66% K−1 at 160 K and reaches 1.04% K−1 at 300 K. The results show that the garnet type Ca3Ga2Ge3O12:Eu3+ phosphor is a promising material for the application of optical thermometry.

Graphical abstract: Enhanced 5D0 → 7F4 transition and optical thermometry of garnet type Ca3Ga2Ge3O12:Eu3+ phosphors

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Publication details

The article was received on 05 Mar 2018, accepted on 25 Mar 2018 and first published on 26 Mar 2018


Article type: Research Article
DOI: 10.1039/C8QI00199E
Citation: Inorg. Chem. Front., 2018,5, 1288-1293
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    Enhanced 5D07F4 transition and optical thermometry of garnet type Ca3Ga2Ge3O12:Eu3+ phosphors

    F. Chi, X. Wei, S. Zhou, Y. Chen, C. Duan and M. Yin, Inorg. Chem. Front., 2018, 5, 1288
    DOI: 10.1039/C8QI00199E

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