Open AccessOptical properties of amorphous SiOx:C particles calcined in air at elevated temperature
Author(s) -
Lianxi Zheng,
Huang Bai-Biao,
Wei Ji-yong,
Dai Ying
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.217803
Subject(s) - materials science , photoluminescence , amorphous solid , annealing (glass) , luminescence , scanning electron microscope , calcination , analytical chemistry (journal) , fourier transform infrared spectroscopy , optics , optoelectronics , composite material , chemistry , crystallography , biochemistry , physics , chromatography , catalysis
Amorphous SiOx:C particles are prepared by pyrolyzing method, and then they are calcined in an air ambient at different temperatures. The structures mophologies and optical properties of samples are analyzed with FTIR spectrum, scanning electron microscopy and fluorescent microscope, respectively. The results show that the luminescence band is blue-shifted with the increase of the annealing temperature. The particles exhibit the highest photoluminescence intensity with the 417 nm peak when annealed at 500 ℃. And the particles possess red, green or blue light emissions at room temperature when irradiated with appropriate wavelengths. Upon heating at a higher temperature (600 ℃ or 800 ℃), the fluorescence intensity of the SiOx:C sample decreases. We think that the phenomenon is attributed to the reduction of the number of oxygen defects in the sample heated at high temperature.