TY - JOUR AU - 심광보 DA - 2016/02 PY - 2016 UR - http://jcpr.kbs-lab.co.kr/file/JCPR_vol.17_2016/JCPR17-2/10.2016-011_118-121.pdf UR - http://hdl.handle.net/20.500.11754/31757 AB - Yb3+/Er3+ co-doped polycrsytalline yttrium-aluminum garnet (YAG : Yb3+,Er3+) powders were synthesized by a flux (BaF2) assisted solid-state reaction method at low-temperature. The optimum condition of flux concentration and calcination temperature was investigated by the XRD analysis. Crystal structure and upconversion luminescent property of the synthesized YAG : Yb3+,Er3+ powder was analyzed as a function of Yb3+ concentration when concentration of Er3+ was fixed at 25.0 mol%. Under 980 nm excitation, YAG : Yb3+,Er3+ powder exhibited weak red emissions near 660 and 670 nm, and strong green UC emissions at 530 and 550 nm corresponding to the intra 4f transitions of Er3+ (F-4(9/2), H-2(11/2), S-4(3/2)) -˃ Er3+ (I-4(15/2). The Yb3+ 15 mol% doped YAG : Yb3+,Er3+ powder sample exhibited strongly shiny green emission. A possible UC mechanism for YAG : Yb3+,Er3+ depending was discussed in detail. PB - KOREAN ASSOC CRYSTAL GROWTH KW - BaF2 flux KW - YAG:Yb3+,Er3+ KW - upconversion TI - Flux assisted low-temperature synthesis of YAG:Yb3+,Er3+ and its optical property IS - 2 VL - 17 T2 - JOURNAL OF CERAMIC PROCESSING RESEARCH ER -