Judd-Ofelt Parameterization and Luminescence Characterization of Dy3+ Doped Oxyfluoride Lithium Zinc Borosilicate Glasses for Lasers and w-LEDs

• Published in: Journal of non-crystalline solids 2020-09, Vol.544, p.120187, Article 120187
• Main Authors: Poonam, Shivani, Anu, Kumar, A., Sahu, M.K., Rani, P.R., Deopa, Nisha, Punia, R., Rao, A.S.
• Format: Article
• Language: English
• Subjects: Dexter Theory; Dysprosium; Energy Transfer; Glasses; Judd-Ofelt Theory
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2020.120187

•Dy3+ doped OFLZBSD glasses were synthesized by melt quench technique.•Under 351nm excitation the as-quenched glasses show intense white emission.•Dextor theory reveals dipole-dipole interaction between Dy-Dy ions.•Calculated CIE coordinates are fall in white region close to pc based phosphor.•1.0 mol% of Dy3+ ions in these glasses are apt for w-LEDs and Lasers. In this work, Oxyfluoride Lithium Zinc Borosilicate glasses of varying Dy3+ ions concentration were prepared by using a melt quench technique. The optical and luminescence characteristics of Dy3+ ions were analyzed by XRD, absorption and emission spectroscopy. The Judd-Ofelt (J-O) parameters estimated by correlating absorption spectral measurements. The emission profiles displayed three principle bands in blue, yellow, red regions and quenching was detected at 1 mol% of Dy3+ ions. The radiative properties were evaluated for the protuberant luminous levels of Dy3+ ions within the ambit of J-O theory. The color coordinates at 351 nm pumping wavelength provide the worthy white emission. The decay profiles of 4F9/2→6H13/2 showed exponential nature up to 1 mol% and non-exponential elsewhere. It has been observed that 1.0 mol % Dy3+ ions doped OFLZBS glasses are aptly fit for white light generation. This observation showed that as-quenched glasses may have great potentials for lasers and w-LEDs applications.