Study of Eu3+–Gd3+ co-doped Ba–Bi–B glasses for red-laser applications: Physical, structural, photoluminescence and time-resolved spectral characteristics. Issue 4 (15th February 2023)

• Record Type: Journal Article
• Authors: Gelija, Devarajulu; Kumar, B. Kiran; Babu, P. Reddi; Kshetri, Yuwaraj K.; Kim, Tae-Ho; Prasad Raju, B. Deva; Kim, Moon-Deock
• Is Part Of: Ceramics international. Volume 49:Issue 4(2023)
• Page Start: 5872
• Page End: 5883
• Publication Date: 2023-02-15
• Subjects: Eu3+/Gd3+ ions -- Barium–bismuth-borate glasses -- Photoluminescence -- Energy transfer -- Time-resolved spectroscopy -- Display devices; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.10.208
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A series of Eu 3+ and Eu 3+ /Gd 3+ co-doped barium-bismuth-borate (Ba–Bi–B) glasses were prepared by melt-quench technique. And deliberated the physical, structural, and spectroscopic properties of all glasses and explored the energy transfer process from Gd 3+ to Eu 3+ ions. The density of glasses increased with increasing of Gd 3+ concentration in co-doped glasses. Characteristics of steady-state and time-resolved photoluminescence (PL) of Eu-doped and Eu 3+ -Gd 3+ co-doped glasses under different excitation wavelengths suggested the prospects of the investigated glass system for display device applications. PL spectrum displays a strong red emission peak centered at 612 nm due to the Eu 3+ : 5 D0 → 7 F2 transition. Less intense emissions centered at 577 nm ( 7 F0 ), 590 nm ( 7 F1 ), 651 nm ( 7 F3 ) and 700 nm ( 7 F4 ) are also observed from the radiative transitions of the excited state 5 D0 of Eu 3+ ions. The values of radiative parameters such as transition probability, branching ratios, and stimulated emission cross-sections were obtained from Judd–Ofelt theory analysis and indicated the aptness of the Ba–Bi–B glasses for optical devices. A 5-fold enhancement in the PL intensity was observed in 1.0 mol% Eu 3+ and 3.0 mol% Gd 3+ co-doped glass under λExci. = 394 nm excitation. The calculated commission Internationale de l'eclairage color coordinates and correlated color temperature values show that the Ba–Bi–B glasses are useful for red-laser and display device applications.