Synthesis and optical properties of amorphous CSiO particles

Amorphous C–Si–O particles, prepared by pyrolyzing PDMS in a horizontal furnace using the carrier gas N2/H2 at 900°C, were characterized by electron microscopy, X-ray diffraction, FTIR spectroscopy, X-ray photoelectron spectroscopy and fluorescence spectroscopy. The particles possess four luminescence peaks at 440, 465, 533 and 620nm, and produce stable red, green or blue light emissions at room temperature when irradiated with appropriate wavelengths, the four peaks attribute to different defect centers in the particles. And the particles exhibit the highest photoluminescence intensity when annealed at 600°C.