Spectral Investigations of Dy3+-Doped Gd2O3-CaO-P2O5 Glasses

Piyachat Meejitpaisan; Chittra Kedkaew; C.K. Jayasankar; Jakrapong Kaewkhao

doi:10.4028/www.scientific.net/KEM.675-676.384

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 675-676Spectral Investigations of Dy3+-Doped...

Spectral Investigations of Dy³⁺-Doped Gd₂O₃-CaO-P₂O₅ Glasses

Abstract:

Dy³⁺-doped phosphate glasses of the compositions 20Gd₂O₃ : 10CaO : (70-x)P₂O₅ : xDy₂O₃, where x = 0.05, 0.10, 0.50, 1.00 and 1.50 mol% have been prepared by melt quenching technique and characterized by optical absorption, emission spectra and decay curve analysis. All the transitions in the absorption spectra are originated from the ⁶H_15/2 ground level to the various excited states and these are intra configuration (f-f) transitions. The observed twelve absorption bands centered at 349, 362, 387, 425, 451, 473, 750, 800, 895, 1089, 1266 and 1676 nm are assigned to ⁶P_7/2, ⁴P_3/2, ⁴F_7/2, ⁴G_11/2, ⁴I_15/2, ⁴F_9/2, ⁶F_3/2, ⁶F_5/2, ⁶F_7/2, ⁶F_9/2, ⁶H_9/2and ⁶H_11/2transitions, respectively. The absorption spectra of glasses increase with increase in Dy³⁺ ion concentrations. The emission spectra of Dy³⁺-doped glasses are observed to be centered at 483, 573, 662 and 752 nm originated from the ⁴F_9/2→⁶H_15/2, ⁴F_9/2→⁶H_13/2, ⁴F_9/2→⁶H_11/2 and ⁴F_9/2→⁶H_9/2transitions, respectively under excitation at 349 nm. The highest emission intensity of Dy³⁺-doped glass is 0.50 mol% due to concentration quenching effect. The experimental lifetimes are found to decrease when Dy³⁺ ion concentrations increased due to energy transfer process between Dy³⁺ ions.

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Key Engineering Materials (Volumes 675-676)

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384-388

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https://doi.org/10.4028/www.scientific.net/KEM.675-676.384

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Online since:

January 2016

Authors:

Piyachat Meejitpaisan*, Chittra Kedkaew, C.K. Jayasankar, Jakrapong Kaewkhao

Keywords:

Dysprosium, Emission Spectra, Optical Absorption, Phosphate Glasses

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