Bright Green Emission of Tb³⁺ Doped Lithium Sodium Potassium Borate Glasses for Photonic Application

Abstract

The melt-quenching approach was implemented to create terbium-doped lithium sodium potassium borate glasses (LNKBTb). Archimedes’ principle, absorption and luminescence spectra, including CIE chromaticity were used to characterize the properties of glasses. Terbium in glasses absorbs photon in the visible and near infrared ranges. The intense green emission at 544 nm was generated by the terbium ⁵D₄ to ⁷F₅ transition when excited with ultraviolet–visible (UV–Vis) light. The emission intensities of LNKBTb glasses increased with increasing terbium concentrations up to 4 mol%, after which they decreased, resulting in the concentration quenching effect, whereas decay time decreases as Tb₂O₃ content increases. In CIE 1931, the overall color of emission is green. May bring can continue to develop to use as a photonic material in green light sources and lasers.

Keywords:

• Borate glasses
• CIE
• luminescence
• terbium

Acknowledgments

The authors would like to thank all graduate students and co-researchers in the research laboratory of the Center of Excellence in Glass Technology and Materials Science, and there is also the Industrial Materials Science Division Faculty of Science and Technology Rajamangala University of Technology Phra Nakhon.

Disclosure Statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This project is funded by the National Research Council of Thailand (NRCT) (Contract No. N41A650404) and CERNTEK COMPANY LIMITED.