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Structural and optical characteristics of Eu3+ ions in sodium-lead-zinc-lithium-borate glass system.

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Title: Structural and optical characteristics of Eu3+ ions in sodium-lead-zinc-lithium-borate glass system.
Authors: Rajagukguk, J.1,2, Kaewkhao, J.3 mink110@hotmail.com, Djamal, M.1, Hidayat, R.1, Suprijadi, null1, Ruangtaweep, Y.3
Source: Journal of Molecular Structure. Oct2016, Vol. 1121, p180-187. 8p.
Subjects: Ions, Borate glass, Lithium borate, X-ray diffraction, Electric dipole moments
Abstract: Structural and optical properties of Eu 3+ -doped sodium-lead-zinc-lithium-borate glasses (65− x )B 2 O 3 15Na 2 O 10PbO 5ZnO 5Li 2 O x Eu 2 O 3 (where x = 0, 0.05, 0.1, 0.5, 1.0, 2.0 and 4.0) have been measured and analyzed by varying the Eu 3+ ion concentrations. The physical parameters such as polaron radius, field strength and inter nuclear distance have been determined from measurements of densities and refractive indices. The structural properties of the prepared borate glasses were analyzed based on X-ray diffraction (XRD) and FTIR instruments. The diffraction spectra show no characteristic peaks in these glasses, which indicates the amorphous nature of the glasses. The infrared spectrum of the Eu 3+ -doped sodium-lead-zinc-lithium-borate glass systems show three disparate regions for active absorption band around 830–860 cm −1 , 1020–1040 cm −1 and 1170–1180 cm −1 . The electronic transitions in the UV–vis and NIR regions are assigned to the 7 F 0 → 5 D 4 , 7 F 0 → 5 G 2 , 7 F 0 → 5 L 6 , 7 F 0 → 5 D 3 , 7 F 0 → 5 D 2 , 7 F 0 → 5 D 1 , 7 F 0 → 5 D 0 7 F 1 → 5 D 0 7 F 0 → 7 F 6 and 7 F 1 → 7 F 6 levels centered at 362 nm, 380 nm, 395 nm, 414 nm, 465 nm, 533 nm, 583 nm, 590 nm 2092 nm and 2202 nm respectively. Five transition bands of luminescence spectra have been observed by using an excited wavelength of 395 nm. The luminescence intensity ratio ( R ) of 5 D 0 → 7 F 2 (electric dipole) transition to 5 D 0 → 7 F 1 (magnetic dipole) transition has been determined to obtain the strength of the covalent/ionic bond between the Eu 3+ ions and the surrounding ligands. Radiative life time and emission color of the glasses were estimated and compared with other literature data by varying Eu 3+ concentrations. The experimental lifetime of the 5 D 0 level was found to increase with increasing Eu 3+ ion content, suggesting higher non-radiative energy transfer among Eu 3+ ions in the glasses. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Structural and optical properties of Eu 3+ -doped sodium-lead-zinc-lithium-borate glasses (65− x )B 2 O 3 15Na 2 O 10PbO 5ZnO 5Li 2 O x Eu 2 O 3 (where x = 0, 0.05, 0.1, 0.5, 1.0, 2.0 and 4.0) have been measured and analyzed by varying the Eu 3+ ion concentrations. The physical parameters such as polaron radius, field strength and inter nuclear distance have been determined from measurements of densities and refractive indices. The structural properties of the prepared borate glasses were analyzed based on X-ray diffraction (XRD) and FTIR instruments. The diffraction spectra show no characteristic peaks in these glasses, which indicates the amorphous nature of the glasses. The infrared spectrum of the Eu 3+ -doped sodium-lead-zinc-lithium-borate glass systems show three disparate regions for active absorption band around 830–860 cm −1 , 1020–1040 cm −1 and 1170–1180 cm −1 . The electronic transitions in the UV–vis and NIR regions are assigned to the 7 F 0 → 5 D 4 , 7 F 0 → 5 G 2 , 7 F 0 → 5 L 6 , 7 F 0 → 5 D 3 , 7 F 0 → 5 D 2 , 7 F 0 → 5 D 1 , 7 F 0 → 5 D 0 7 F 1 → 5 D 0 7 F 0 → 7 F 6 and 7 F 1 → 7 F 6 levels centered at 362 nm, 380 nm, 395 nm, 414 nm, 465 nm, 533 nm, 583 nm, 590 nm 2092 nm and 2202 nm respectively. Five transition bands of luminescence spectra have been observed by using an excited wavelength of 395 nm. The luminescence intensity ratio ( R ) of 5 D 0 → 7 F 2 (electric dipole) transition to 5 D 0 → 7 F 1 (magnetic dipole) transition has been determined to obtain the strength of the covalent/ionic bond between the Eu 3+ ions and the surrounding ligands. Radiative life time and emission color of the glasses were estimated and compared with other literature data by varying Eu 3+ concentrations. The experimental lifetime of the 5 D 0 level was found to increase with increasing Eu 3+ ion content, suggesting higher non-radiative energy transfer among Eu 3+ ions in the glasses. [ABSTRACT FROM AUTHOR]
ISSN:00222860
DOI:10.1016/j.molstruc.2016.05.048