Photoluminescence study of Eu3+ doped zinc-tungsten-antimonite glasses for red LED applications

Author(s)

Roy, Joy Sankar ; Messaddeq, Younes

• Document type: Journal article
• Source: Journal of Luminescence; v. 228, p. 4-pg., 2020-12-01.

Abstract

The rare earth ions doped glassy materials have become crucial capstone in solid state lighting due to their topnotch optical properties. In this work, Eu3+ doped zinc-tungsten-antimonite glasses with compositions of (60 - x) Sb2O3 - 15WO(3) - 25ZnO - xEu(2)O(3) (where x is 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0) were prepared by melt quenching technique. The glasses were prepared with the variation of concentration of Eu3+ ions to achieve superior brightness. The emission intensity increases with the increasing concentration of Eu3+ ions. The prepared glasses exhibit strong hypersensitive red emission at 616 nm due to D-5(0) -> F-7(2) transition under 465 nm excitation wavelength. Along with maximum bright red emission of 3 mol % Eu3+ doped glass also demonstrates high degree of excited state lifetime (556 mu s). All these properties strongly validate the bright prospect of these luminescent glasses for utilizing in red LED applications. (AU)

• FAPESP's process: 19/12212-9 - Fabrication of an optical fiber monolithic reactor for photocatalytic wastewater treatment
• Grantee: Joy Sankar Roy
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 15/22828-6 - Pushing the boundaries of optical fibers: from photonics to optogenetics and environmental monitoring
• Grantee: Younes Messaddeq
• Support Opportunities: Research Projects - SPEC Program
• FAPESP's process: 17/16826-6 - Multi material exploitation in manufacturing photocatalytic semiconductor glass fibers for pollution suppression
• Grantee: Joy Sankar Roy
• Support Opportunities: Scholarships in Brazil - Post-Doctoral