Photoluminescence of Tm³⁺/Yb³⁺co-doped Na₀.₅Gd₀.₅MoO₄ Upconversion Phosphor Synthesized by Solid State Reaction

• 발행기관: 한국방사선학회
• 저자명: 이유진 양현경 제재용
• 간행물 정보: 『한국방사선학회 학술대회 논문집』한국방사선학회 2017년 추계종합학술대회논문집, 85~85쪽, 전체 1쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2017.11.10

영문 초록

Rare earth doped upconversion (UC) materials have attracted considerable attention. Because UC materials have unique optical properties and potential applications in fields such as volumetric displays, temperature sensors, UC lasers and photodynamic therapy. among the host materials, complex oxide hosts are the best because of their pronounced chemical and mechanical stability under ambient conditions, appropriate synthesis technologies and structural diversity. The molybdates with scheelite tetragonal crystal structure has been used as a host for the luminescence of rare-earth ions because of good physical stability, high density and superior intrinsic luminescent properties. Among molybdate materials, double alkaline rare-earth molybdates ARe(MoO₄)₂(A=alkali metal ion, Re=trivalent rare-earth ion) have been demonstrated to be promising candidates as luminescent host materials for numerous applications. In this experiment, Yb³⁺/Tm³⁺ co-doped Na₀.₅Gd₀.₅MoO₄ upconversion phosphors synthesized by the solid state reaction method. The surface morphology of phosphors were obtained with a field emission scanning electron microscope (FE-SEM JEOL JEM-2001F). The photoluminescence spectra and pump power dependence of the phosphors were measured with a fluorescence spectrophotometer (Acton SpectraPro 750-Triplet Grating Monochrometor) from CCD detector (Princeton EEV 10241024 and PI-Max 133 Controller).

키워드

Na₀ .₅ Gd₀ .₅ MoO₄:Yb³⁺ /Tm³⁺ phosphor upconversion