UV to NIR Down-Shifting in Yb³⁺-Doped Phosphate Glass via Divalent Tin Centers

Authors

José A. Jiménez, Georgia Southern University
Dugan Hayes, University of Rhode IslandFollow
Carson Hasselbrink, University of Rhode Island

Document Type

Article

Date of Original Version

11-3-2022

Department

Chemistry

Abstract

The conversion of ultraviolet (UV) to near-infrared (NIR) photons is demonstrated for the first time in Yb³⁺-containing glass via Sn²⁺. Glasses with barium phosphate matrix were prepared by melt-quenching adding 2 mol % Yb₂O₃ alongside SnO up to 10 mol %. The investigation encompassed X-ray diffraction (XRD), UV-vis-NIR absorption, ¹¹⁹Sn Mössbauer spectroscopy, and photoluminescence (PL) spectroscopy measurements with emission dynamics assessment. XRD data showed that the amorphous nature of the glasses is maintained within the range of dopant concentrations considered, while the optical absorption, ¹¹⁹Sn Mössbauer, and PL data supported the occurrence of divalent tin centers. The NIR PL data showed that exciting Sn²⁺ centers around 290 nm results in the NIR emission from Yb³⁺ near 1000 nm which becomes more intense with the increase in SnO. The Yb³⁺ decay curves revealed a rise time for the ²F_5/2 emitting level followed by a single exponential decay. An energy transfer process proceeding via charge transfer states involving tin (donor) and ytterbium (acceptor) was proposed to account for the enhanced UV-excited NIR emission from Yb³⁺ ions.

Publication Title, e.g., Journal

Journal of Physical Chemistry C

Volume

126

Issue

43

Citation/Publisher Attribution

José A. Jiménez, Dugan Hayes, and Carson Hasselbrink. "UV to NIR Down-Shifting in Yb3+-Doped Phosphate Glass via Divalent Tin Centers." Journal of Physical Chemistry C, 126(43), 18421-18428 (2022). DOI: 10.1021/acs.jpcc.2c04429.

Available at: https://doi.org/10.1021/acs.jpcc.2c04429