pp. 3419-3429
S&M4126 Research Paper https://doi.org/10.18494/SAM5773 Published: August 8, 2025 Enhanced Green Emission in Solid-state-synthesized LaF3–LaOF:Yb3+/Tb3+ Upconversion Phosphors [PDF] Toshihiro Nonaka, Mutsuto Yamamoto, Takahito Imai, and Shin-Ichi Yamamoto (Received June 6, 2025; Accepted July 10, 2025) Keywords: upconversion, LaF3, LaOF, Yb3+, Tb3+
In this study, LaF3–LaOF:Yb3+/Tb3+ was synthesized by a solid-state reaction method, and the effects of varying molar ratios on the crystal structure and optical properties of the resulting material were analyzed. Crystal structure analysis using X-ray diffraction revealed that the synthesized samples were composed of LaOF and LaF3. The photoluminescence (PL) spectra showed peaks at 486 (5D4→7F6), 541 (5D4→7F5), 583 (5D4→7F4), and 620 nm (5D4→7F3). The analysis of the pump-power dependence of the PL intensity revealed that the emission was a two-photon process, because the slopes obtained at wavelengths of 486 and 541 nm were approximately equivalent to 2. These research findings contribute to the further development of Tb³⁺-doped phosphors for temperature-sensing applications.
Corresponding author: Toshihiro Nonaka![]() ![]() This work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Toshihiro Nonaka, Mutsuto Yamamoto, Takahito Imai, and Shin-Ichi Yamamoto, Enhanced Green Emission in Solid-state-synthesized LaF3–LaOF:Yb3+/Tb3+ Upconversion Phosphors, Sens. Mater., Vol. 37, No. 8, 2025, p. 3419-3429. |