Dy3+ and Eu3+ co-activated gadolinium aluminate borate phosphor: Synthesis, enhanced luminescence, energy transfer and tunable color. (August 2023)

• Record Type: Journal Article
• Authors: Madkhali, O.; Kaynar, Ümit H.; Cam Kaynar, S.; Ayvacikli, M.; Can, N.
• Is Part Of: Materials research bulletin. Volume 164(2023)
• Publication Date: 2023-08
• Subjects: GdAl3(BO3)4 -- Rare earths -- XRD -- EDS -- Photoluminescence -- Decay curve -- Energy transfer; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2023.112282
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: A series of Dy 3+ doped and Eu 3+ co-doped GAB phosphors were synthesized. The phosphor GAB doped with Dy 3+ has the optimal luminescence performance. Direct transfer of energy from Dy 3+ to Eu 3+ are observed. The effects of energy transfer on luminescence lifetime of the ions were discussed. Concentration quenching and cross-relaxation between adjacent RE were discussed. Abstract: The synthesis of GdAl3 (BO3 )4 phosphors incorporated with activators of Dy 3+ and Dy 3+ / Eu 3+ was successful and achieved through the gel combustion method. Powder X-ray diffraction (XRD) was employed to identify phase purity and the effects of dopant concentration on the crystallographic structure. The results of Photoluminescence (PL) measurements revealed that the intensity and lifetime of luminescence properties varied depending on the concentrations of Dy 3+ and Eu 3+ ions. The dependence of luminescence intensity on doping concentration is investigated with respect to the energy transfer process between Eu 3+ and Dy 3+ ions. A decrease in luminescence lifetime occurs with increasing concentrations of Eu 3+ co-doping. The energy transfer was also investigated using decay curve analysis. The co-doping of Eu 3+ significantly boosts the energy transfer efficiency from 26% to 84%. These findings make GdAl3 (BO3 )4 : Dy 3+, Eu 3+ phosphors an ideal choice for LED applications in solid state lighting and displays. Graphical abstract: Image, graphical abstract