Thermal Plasma Synthesis and Optical Properties of Zn2SnO4 Nanopowders
H-F Lin, S-C Liao, S-W Hung, C-T Hu
Industrial Technology Research Institute, TW
Keywords: DC thermal plasma, Zn2SnO4, nanopowder, optical properties
Abstract:In this research, we have used the DC thermal plasma technique to produce well-crystallized Zinc stannate (Zn2SnO4) nanopowders from the commercial Zn-Sn alloy wire. The as-synthesized Zn2SnO4 consisted of spherical, rhombhedral and hexagonal nanoparticles with an average size of about 35nm. The room-temperature photoluminescence spectroscopy of the Zn2SnO4 showed a UV emission at 390 nm and visible emissions at 577, 651 and 671 nm. The UV emission was assigned to the near band-edge emission while the visible emissions corresponded to the deep-level emissions from various defects. The UV-Vis-IR spectroscopy of the Zn2SnO4 revealed significant absorption in the NIR region, which is attributed to the plasmon resonance effect.