Thermal decomposition of graphite film on porous silicon

  • Joybelle Lopez Material Science and Engineering Program, University of the Philippines Diliman
  • Alexander De Los Reyes National Institute of Physics, University of the Philippines Diliman
  • Maria Cecilia Angub Material Science and Engineering Program, University of the Philippines Diliman
  • Rontgen Gapusan Material Science and Engineering Program, University of the Philippines Diliman
  • Arven Cafe National Institute of Physics, University of the Philippines Diliman
  • Arnel Salvador National Institute of Physics, University of the Philippines Diliman
  • Elmer Estacio National Institute of Physics, University of the Philippines Diliman
  • Armando Somintac National Institute of Physics, University of the Philippines Diliman
Keywords: Porous silicon, Carbon, Electric double layer capacitor, electrode

Abstract

We report on the electrochemical deposition of carbon-coated porous silicon composite films. PSi samples were fabricated via laterally-configured anodization cell set-up varying the applied current density. Carbon layer was coated through thermolysis of a polyfurfuryl alcohol (PFA) precursor on PSi surface. SEM micrographs show that the PSi film fabricated from a higher current density contained a thicker carbon layer. Raman spectra show peaks centered at ~1360cm-1 and ~1600cm-1 which corresponds to the D and G bands of carbon. Reflectance spectroscopy was done to examine the optical changes of PSi and carbon-coated PSi composite films. The interference fringes visible at the spectra of PSi films were reduced after coating that may be attributed from the high absorption of the deposited carbon layer.

Published
2017-06-07
Section
Condensed Matter and Materials Science