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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Up-conversion luminescence properties of YGdVO4:Yb/Er phosphor with various host material concentrations

2015년 8월 27일 16시 56분 15초
MAT.P-461 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 16일 (금요일) 13:00~14:30
저자 및
정종원, GerelkhuuZayakhuu, 오주현1, 이용일*
창원대학교 화학과, Korea
1부경대학교 물리학과, Korea
Nanoparticles have been the subject of increased scientific interest, both for fundamental research and for a wide area of application. Upconversion is a process that generating higher energy emission from low energy of incident light. Many trivalent rare earth ions such as Er3+, Yb3+, Tm3+ and Pr3+ are doped as emission and absorption centers in these materials. The Yb3+ ion has simple energy level about 980nm. So, the Yb3+ ion was easily excited by 980 nm laser diode. When Er3+ attach to Yb3+, they generate effective energy transfer, because of agreement in emission range of Yb3+ and absorption range of Er3+. In this study, Er3+ and Yb3+ co-doped YGdVO4 phosphors were prepared by hydrothermal method, which was a fast, reproducible and easily scaled up chemical route for obtaining fine power of oxide. Their crystalline structures, surface morphologies and phase transitions were investigated according to annealing process by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL). Upconversion luminescence spectrum was measured by using 980 nm laser diode. Under 980nm laser diode excitation, the YGdVO4:Er3+, Yb3+ powder show the intense green upconversion emission, which is 2H11/2, 4S3/2 ? 4I15/2. The X-ray diffraction patterns of YGdVO4:Er3+,Yb3+ reveal that the sample have been successfully synthesized. The aim of this study is to compare the luminescence characteristics of GdVO4, YVO4, and YGdVO4 phosphors which were synthesized with three different host material concentration.