Energy Transfer in Dy3+ and Tb3+ Double-Doped Barium Borate Glass

Michelle Grüne; Stefan Schweizer

doi:10.3390/ma16072596

Energy Transfer in Dy³⁺ and Tb³⁺ Double-Doped Barium Borate Glass

Materials (Basel). 2023 Mar 24;16(7):2596. doi: 10.3390/ma16072596.

Authors

Michelle Grüne¹, Stefan Schweizer^{1

2}

Affiliations

¹ Faculty of Electrical Engineering, South Westphalia University of Applied Sciences, Lübecker Ring 2, 59494 Soest, Germany.
² Fraunhofer Application Center for Inorganic Phosphors, Branch Lab of Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Lübecker Ring 2, 59494 Soest, Germany.

Abstract

In this work, single- and double-doped Dy3+ and Tb3+ barium borate glasses are investigated for their potential as light converters. The density and the absorption coefficient show linearly increasing trends with an increasing lanthanide content. The external quantum efficiency of the double-doped samples is a combination of the respective single-doped samples. The strong energy transfer from Dy3+ to Tb3+ results in an intense Tb3+-related emission, i.e., an intense green luminescence. Thus, excitation at a Dy3+-related wavelength of 452 nm enables a Tb3+-related emission, at which a single-doped Tb3+ sample barely shows any luminescence. Lifetime measurements show that there is not only an energy transfer from Dy3+ to Tb3+, but also vice versa.

Keywords: borate glass; double doping; dysprosium; energy transfer; lifetime; light converter; luminescence; terbium.

Grants and funding

This research received no external funding.