Articles
  • Up-conversion luminescence from poly-crystalline Yb3+, Er3+ co-doped NaGd(MoO4)2 by simple solid state method
  • Suk Hyun Kanga, Hee Ae Leea, Jae Hwa Parka, Cheol Woo Parka, Hyun Mi Kima, Hyo Sang Kanga, Jae Sang Choia, Joo Hyun Junga, Jung Hun Leea , Jeong Ho Ryub and Kwang Bo Shima,*
  • a Division of 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
The up-conversion (UC) luminescence properties of polycrystalline Er3+/Yb3+ co-doped NaGd(MoO4)2 phosphors synthesized by a simple solid-state reaction method were investigated in detail. Under 980 nm excitation, Er3+/Yb3+ co-doped NaGd(MoO4)2 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 optimum doping concentration of Er3+ and Yb3+ for highest emission intensity was determined by XRD and PL analysis. The Er3+/Yb3+ (10.0/10.0 mol%) co-doped NaGd(MoO4)2 phosphor sample exhibited strongly shiny green emission. A possible UC mechanism for Er3+/Yb3+ co-doped NaGd(MoO4)2 depending on the pump power dependence was discussed in detail.

Keywords: Upconversion, NaGd(MoO4)2, Two-photon process, Rare earth ion.

This Article

  • 2016; 17(5): 468-471

    Published on May 31, 2016