White Light Emission from Dy³⁺ Doped Zinc Bismuth Borate and Bismuth Borate Glasses: A Comparative Study

Abstract:

In this study, the effect of zinc bismuth borate (ZBB) glass and bismuth borate glass (BB) doped with trivalent dysprosium ion were investigated. Glass were prepared by the conventional melt quenching technique, with the chemical composition of (60-x) B₂O₃: 30Bi₂O₃: 10ZnO: xDy₂O₃ and (70-x) B₂O₃: 30Bi₂O₃: xDy₂O₃ where x = 1.0 mol %. The results show the densities of glasses are 3.91 g/cm³(ZBB) and 4.24 g/cm³ (BB), respectively. The absorption spectra consists of six absorption bands that are located at 752, 796, 902, 1096, 1276 and 1681 nm, and are assigned to ⁶H_15/2 to ⁶F_3/2, ⁶F_5/2, ⁶F_7/2, ⁶H_7/2+⁶F_9/2, ⁶F_11/2+⁶H_9/2 and ⁶H_11/2 transitions. The emission spectra exhibited three emission bands corresponding to the ⁴F_9/2 → ⁶H_15/2 (483 nm; blue), ⁴F_9/2 → ⁶H_13/2 (575 nm; yellow) and ⁴F_9/2 → ⁶H_11/2 (664 nm; red) transitions. The lifetime for ⁴F_9/2 → ⁶H_13/2 transition are 0.178 ms (ZBB) and 0.420 ms (BB). Both of Dy³⁺ in ZBB and BB glasses have been show white emission and illustrated by CIE 1931 chromaticity coordinates.

• Periodical: Key Engineering Materials (Volumes 675-676)
• Pages: 409-413
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.675-676.409
• Online since: January 2016
• Authors: Patarawagee Yasaka*, Kitipun Boonin, Jakrapong Kaewkhao
• Keywords: Dysprosium, Glass, Luminescence, White Light Emission

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