[18a-136-1~12] 3.7 Laser processing

[18a-136-8] Fabrication of Ce³⁺:CaF₂ Phosphor and Evaluation of its Emission Characteristics

〇Masato Hishiki¹, Yusuke Inoue¹, Shingo Ono¹, Shunsuke Kurosawa², Akira Yoshikawa² (1.Nagoya Institute of Technology, 2.Tohoku Univ.)

Keywords:thin film, phosphor, rare earth ion

We thinned Ce^3+:CaF₂ phosphor, which is expected to be used as ultraviolet light source. When Ce³⁺ ion is replaced with Ca²⁺ ion in CaF₂ crystal, the lattice distortion occurs because the radius of Ce³⁺ ion is bigger than that of Ca²⁺ ion. We calculated the actual doping concentration of Ce³⁺ ion in the thin films from the lattice distortion. In addition, the investigation to reveal the relation of the doping concentration and emission characteristics for high effeciency light emission of phosphor was conducted.