Articles
  • Flux assisted low-temperature synthesis of YAG: Yb3+,Er3+ and its optical property
  • Suk Hyun Kanga, Jeong Ho Ryub, Cheol Woo Parka, Jae Hwa Parka, Hyun Mi Kima, Hyo Sang Kanga, Jae Sang Choia, Joo Hyun Junga, Bong Geun Choia and Kwang Bo Shima,*
  • a Division of advanced Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea b Department of Materials Science and Engineering, Korea National University of Transportation, Chungbuk 380-702, Korea
Abstract
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+ (4F9/2, 2H11/2, 4S3/2)→Er3+ (4I15/2). 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.

Keywords: BaF2 flux, YAG: Yb3+,Er3+, upconversion.

This Article

  • 2016; 17(2): 118-121

    Published on Feb 29, 2016