Thermally stable red luminescence from Eu3+‐activated telluro zinc phosphate glass under near‐ultraviolet light excitation for photonic applications. (25th October 2022)

• Record Type: Journal Article
• Authors: Vikas, ; Jayasimhadri, Mula
• Is Part Of: Luminescence. Volume 37:Number 12(2022)
• Page Start: 2059
• Page End: 2066
• Publication Date: 2022-10-25
• Subjects: phosphate glass -- structural and luminescence properties -- white LEDs; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.4391
• Languages: English
• ISSNs: 1522-7235

Abstract

Abstract: Telluro zinc phosphate (TZP) glasses doped with different concentrations of Eu 3+ ions were prepared and their physical, structural, and luminescence properties were studied in detail to reveal the utility of the as‐prepared glass for white light‐emitting diode (w‐LED) applications. The broad hump in the diffraction pattern specified the amorphous behaviour of the TZP glass. The various vibrational shoulder linkages were characterized using the Fourier transform infrared (FT‐IR) spectroscopy. The optical absorption spectrum was measured in the ultraviolet (UV)–visible (Vis) light region for the Eu 3+ ‐doped TZP (TZPE) glass and the optical band gap was found to be 3.12 eV. Eu 3+ ‐doped TZP glasses showed several emission peaks in the visible region including an intense red emission peak due to the 5 D0 → 7 F2 transition under an excitation wavelength of λex = 393 nm, which was matched with the emitting wavelength of the near‐UV LED chip. Commission Internationale de I'Eclairage (CIE) chromaticity coordinates were situated in the red region and nearly matched with the coordinates of the commercial red phosphor (Y2 O3 S:Eu 3+ ). The decay profile of the TZPE50 glass exhibited a single exponential fit with a decay time ( τ ) of 1.76 ms. Temperature‐dependent photoluminescence (TDPL) studies demonstrate that the as‐prepared glass consist of excellent thermal stability. The detailed analysis and results confirmed that the red‐emitting TZPE glasses were potential candidates for white‐LED and other photonic applications. Abstract : Telluro zinc phosphate (TZP) glasses doped with different concentrations of Eu 3+ ions were prepared via employing the melt quenching method. Eu 3+ doped TZP (TZPE) glasses show several emission peaks in the visible region. The chromaticity coordinates were situated in the red region and nearly matched with (Y2 O3 S: Eu 3+ ) commercial red phosphor. Temperature‐dependent photoluminescence (TDPL) studies demonstrate the exceptional thermal stability of TZPE glasses with high activation energy. Thus, the red‐emitting Eu 3+ doped TZP glasses are potential candidates for white‐LEDs applications.