20-100nm thin films of silver were first deposited on quartz glass by magnetron sputtering. These specimens were then annealed at 500 °C for 15 min by rapid thermal annealing (RTA), which might change the silver films into having a morphology of nano islands. Subsequently, a thin film of Mn-doped ZnO was deposited on the above specimens in a sputtering system. These specimens were removed from the sputtering system and annealed again in an atmospheric furnace at 1200 °C for 2 h. By X-ray diffraction (XRD) analysis, the annealed samples were identified as Mndoped Zn2SiO4 crystals. Furthermore, photoluminescence (PL) measurement showed the 530nm (green light) fluorescence. The silver nano islands embedded in the Mn-doped Zn2SiO4 crystals tended to show an increase in PL intensity in the following order and in increase rate composed with their pristine Mn-doped Zn2SiO4 counterpart: 100nm Ag (-0:33%), 50nm Ag (-0:02%), 20nm Ag (87.4%), 40nm Ag (124.3%), and 30nm Ag (168.5%). Accordingly, the plasmon effect may lead to the enhancement of fluorescence, and the size of silver nano islands determines the increase rate.
ASJC Scopus subject areas
- Physics and Astronomy(all)