Preparation and Judd-Ofelt Analysis of Warm Red Luminescent Eu 3+ Complexes for Semiconductor Lasing Devices.

Autor: Kumar M; University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India., Ahlawat P; University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India., Kumari P; University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India., Lather V; Shri Guru Ram Rai Institute of medical and Health Sciences, Dehradun, 248001, India., Khatkar A; Department of Chemistry, Deenbandhu Chhotu Ram University of Science and Technology, Sonipat, 131039, India., Sehrawat H; University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India., Kumar R; University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India. lather_rajesh@yahoo.com.
Jazyk: angličtina
Zdroj: Journal of fluorescence [J Fluoresc] 2024 Jun 21. Date of Electronic Publication: 2024 Jun 21.
DOI: 10.1007/s10895-024-03780-z
Abstrakt: Six novel red photoluminescent Eu 3+ complexes with 3-formyl chromone as the primary sensitizer (L) were synthesized using the solution precipitation method. These complexes are [Eu(L 3 ).X] where X is 2H 2 O (C1), phen (C2), neo (C3), bipy (C4), dmph (C5), and biquno (C6). These complexes were characterized by elemental analysis, EDAX analysis, SEM, FT-IR, thermo-gravimetric analysis (TGA/DTA) and photoluminescence spectra. The transition rates, quantum efficiency, and J-O intensity parameters were calculated using emission data and luminescence decay time (τ). Complexes exhibit a strong emission peak ( 5 D 0  →  7 F 2 ) of the Eu 3+ ion in their luminescence emission spectra in solid and solution states, making them an effective emitter of the red color in OLEDs. The branching ratio of these complexes ranges from 80.67-82.92 in solid and 50.53-62.65 in solution state; CIE color coordinate of complexes falls in the red region. The color purity ranges [CP(%)] values for solid 95.26-97.27% and for solution ranges 85.11-93.43%. Correlated color temperature (CCT) of the complexes (C1-C6) ranged from 2710 to 3049 K in the solid state and 1775 to 2450 K in the solution state. These complexes are promising red emitters in OLEDs, semiconductors, and leasing devices.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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