Articles
  • Photoluminescence properties of Mn4+-activated Li2ZnSn2O6 red phosphors
  • Byoung Su Choi a, Dong Hwa Leeb, Jeong Ho Ryuc and Hyun Chob,*
  • aDepartment of Nano Fusion Technology, Pusan National University, Gyeongnam 50463, Korea bDepartment of Nanomechatronics Engineering, Pusan National University, Busan 46241, Korea cDepartment of Materials Science and Engineering, Korea National University of Transportation, Chungbuk 27469, Korea
Abstract
The Mn4+-activated Li2ZnSn2O6 (LZSO:Mn4+) red phosphors were synthesized by the solid-state reaction at temperatures of 1100-1400 oC in air. The synthesized LZSO:Mn4+ phosphors were confirmed to have a single hexagonal LZSO phase without the presence of any secondary phase formed by the Mn4+ addition. With near UV and blue excitation, the LZSO:Mn4+ phosphors exhibited a double band deep-red emission peaked at ~658 nm and ~673 nm due to the 2E→4A2 transition of Mn4+ ion. PL emission intensity showed a strong dependence on the Mn4+ doping concentration and the 0.3 mol% Mn4+-doped LZSO phosphor produced the strongest PL emission intensity. Photoluminescence emission intensity was also found to be dependent on the calcination temperature and the optimal calcination temperature for the LZSO:Mn4+ phosphors was determined to be 1200 oC. Dynamic light scattering (DLS) and field-effect scanning electron microscopy (FE-SEM) analysis revealed that the 0.3 mol% Mn4+-doped LZSO phosphor particles have an irregularly round shape and an average particle size of ~1.46 μm.

Keywords: Li2ZnSn2O6:xMn4+ phosphors, Solid-state reaction, Deep red emission, Photoluminescence properties

This Article

  • 2019; 20(1): 80-83

    Published on Feb 28, 2019