Jump to main content
Jump to site search

Issue 104, 2016, Issue in Progress
Previous Article Next Article

Porous silicon–polyaniline hybrid composites synthesized through electroreduction of an aryldiazonium salt: preparation and photocurrent properties

Author affiliations

Abstract

The results of an experimental study on the photocurrent properties of porous silicon (PSi) coated with polyaniline (PANI) are presented in this work. A three step approach is adopted for the fabrication of a stable and uniform coating: in the first step PSi electrodes were functionalized by electrochemical reduction of 4-nitrobenzenediazonium (NBD) salts in acetonitrile media, in the second step the nitro groups were electrochemically reduced to amino groups and in the last step aniline polymerization was performed on the surface of the aminophenyl-modified PSi. As a comparison, samples were prepared by direct polymerization of aniline onto PSi surfaces. The samples were characterized by reflectivity and photocurrent measurements. The results show an absorption capability of the NBD modified hybrid structures higher than those of the pristine PSi. The increase was in the range from 20% to 300%, depending on the wavelength. The photocurrent data are explained with the formation of a p–n junction between the polymer and semiconductor. The samples prepared by direct polymerization did not show appreciable variation with respect to the pristine PSi.

Graphical abstract: Porous silicon–polyaniline hybrid composites synthesized through electroreduction of an aryldiazonium salt: preparation and photocurrent properties

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 05 Aug 2016, accepted on 16 Oct 2016, published on 18 Oct 2016 and first published online on 18 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA19868F
Citation: RSC Adv., 2016,6, 101880-101887
  •   Request permissions

    Porous silicon–polyaniline hybrid composites synthesized through electroreduction of an aryldiazonium salt: preparation and photocurrent properties

    M. Tiddia, G. Mula, M. Mascia, E. Sechi and A. Vacca, RSC Adv., 2016, 6, 101880
    DOI: 10.1039/C6RA19868F

Search articles by author