Structural, dielectric, optical and photoluminescence studies of Tm3+ doped B2O3-BaO-MgO-Li2O-Na2O-LiF glasses featuring strong blue emission

Monisha, M and Prabhu, Nimitha S and D'souza, Ashwitha Nancy and Bharadwaj, Suresh and Chowdary, R J and Sayyed, M I and Alhuthali, Abdullah M S and Al-Hadeethi, Y and Kamath, Sudha D (2021) Structural, dielectric, optical and photoluminescence studies of Tm3+ doped B2O3-BaO-MgO-Li2O-Na2O-LiF glasses featuring strong blue emission. Journal of Non-Crystalline Solids, 560. ISSN 0022-3093

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Abstract

A series of Tm3+ doped lithium sodium barium borate glasses with following matrix compositions (50-x) B2O3- 10BaO-10MgO-10Li2O-10Na2O-10LiF-xTm2O3 (x=0.25, 0.5, 1.0 and 1.5 mol %) were prepared by melt�quenching technique. The structural, dielectric, optical and luminescence properties of the glasses were stud�ied. FTIR study shows the presence of various vibrational bands and the number of bridging (N4) and non�bridging (N3) oxygens were calculated from the deconvoluted FTIR spectra. The frequency and temperature dependent dielectric properties were analyzed in the frequency range 1Hz-1MHz and the temperature ranges 50 - 400 ◦C. The UV-Visible-NIR spectrum of the glasses showed the presence of five transition peaks emerging from the ground state ( 3 H6) of Tm3+ ions. Bonding parameter showed the ionic nature exists between Tm3+ ions and its neighbouring ligands. Judd-Ofelt parameters were calculated following the same trend as Ω2 >Ω6> Ω4 for all the prepared glasses. The emission spectra of the glasses were recorded in the visible region and exhibited a strong blue emission at 454 nm from the level 1 D2 → 3 F4. Also, the prepared glasses have high experimental branching ratio value (~0.9) which suggests that the prepared glasses can be used for blue laser application. Commission Internationale de I’Eclairage (CIE) coordinates and color correlated temperature (CCT) values (~1500K) supported the application of the glasses for cool blue solid-state lighting.

Item Type: Article
Uncontrolled Keywords: FTIR Dielectric properties Judd-ofelt parameters Radiative parameters CCT values
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 05 Oct 2021 09:19
Last Modified: 05 Oct 2021 09:19
URI: http://eprints.manipal.edu/id/eprint/157474

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