Multicolor emission in potassium-zinc phosphate glasses activated with Dy3+, Tb3+ and Dy3+/ Tb3+ for photonic device applications

• Published in: Journal of luminescence 2023-05, Vol.257, p.119617, Article 119617
• Main Authors: Huerta, E.F., Soriano-Romero, O., Meza-Rocha, A.N., Caldiño, U.
• Format: Article
• Language: English
• Subjects: Dy3+/Tb3; Non-radiative energy transfer; Phosphate glass; Photoluminescence; White light emission
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2022.119617

We report the spectroscopy analysis of potassium zinc phosphate glasses activated with Dy3+, Tb3+ and Dy3+/Tb3+. Radiative parameter values (stimulated emission cross section, effective bandwidth, gain bandwidth and optical gain) were obtained for the dysprosium 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 emissions upon 349 nm excitation. Emission of warm white light can be attained in the KZDy glass upon excitation at 349 nm. The co-doped glass can emit yellowish-green light from Tb3+ and Dy3+ luminescence sensitized by Dy3+ (upon 394 nm excitation) and Tb3+ (upon 377 nm excitation), respectively. The Dy3+ to Tb3+ energy transfer efficiency is higher (38.5%) than that (22.7%) of the Tb3+ to Dy3+ energy transfer. •KZn(PO3)3 glasses are optically activated with Dy3+ (KZDy), Tb3+ (KZTb) and Dy3+/Tb3+ (KZDyTb).•Dy3+.→Tb3+ non-radiative energy transfer occurs in KZDyTb glass excited at 394 nm.•Tb3+.→Dy3+ non-radiative energy transfer occurs in KZDyTb glass excited at 377 nm.•KZDy glass pumped at 349 nm emits 3565 K warm white light.