Orange-red luminescence of samarium-doped bismuth-germanium-borate glass for light-emitting devices.

Autor: V S Bhagavan N; Department of Physics, Dr. V.S. Krishna Govt. Degree College (A), Vishakapatnam, Andhra Pradesh, India., Ravanamma R; Department of Physics, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal, Andhra Pradesh, India., Krishnaiah KV; Department of Physics, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal, Andhra Pradesh, India., Ravi N; Department of Physics, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal, Andhra Pradesh, India., Kagola UK; Department of Physics, School of Applied Sciences, REVA University, Bengaluru, Karnataka, India., Kesavulu CR; Department of Physics, Institute of Aeronautical Engineering, Hyderabad, Telangana, India., Saranya PL; Department of Physics, Govt. Degree College for Women, Vishakapatnam, Andhra Pradesh, India., Venkatramu V; Department of Physics, Krishna University Dr M.R. Appa Row College of PG Studies, Nuzvid, Andhra Pradesh, India.
Jazyk: angličtina
Zdroj: Luminescence : the journal of biological and chemical luminescence [Luminescence] 2023 Oct; Vol. 38 (10), pp. 1750-1757. Date of Electronic Publication: 2023 Aug 02.
DOI: 10.1002/bio.4560
Abstrakt: Samarium (Sm 3+ )-doped glass has sparked a rising interest in demonstrating a noticeable emission in the range of 400-700, which is advantageous in solid-state lasers in the visible region, colour displays, undersea communication, and optical memory devices. This study reports the fabrication of Sm 3+ -doped bismuth-germanium-borate glasses were established using a standard melt-quenching technique and inspection by absorption, steady-state luminescence, and transient studies. The typical peaks of Sm 3+ ions were detected in the visible range under 403 nm excitation. A strong emission band was detected at 599 nm that resembles the 4 G 5/2 → 6 H 7/2 transition of Sm 3+ ions for BGBiNYSm 0.5 glass. Furthermore, a reddish-orange (coral) luminescence at 646 nm that resembles the 4 G 5/2 → 6 H 9/2 transition was also perceived. The stimulated emission cross-section of 4 G 5/2 level for BGBiNYSm 0.5 glass was 0.39 × 10 -22  cm 2 . Lifetime of the 4 G 5/2 level was enhanced for the BGBiNYSm 0.5 glass and decreased with an increase in active ion concentrations. The lifetime quenching of ions at the metastable state was because of energy transfer among Sm 3+ ions by cross-relaxation channels. Commission Internationale de l'Éclairage (CIE) coordinates were evaluated from the emission spectra. Moreover, all the findings recommend these glass as light-emitting materials in the coral region at 599 nm for solid-state lighting applications.
(© 2023 John Wiley & Sons Ltd.)
Databáze: MEDLINE
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