Synthesis and characterisation of polypyrrole–indium phosphide composite film

Abstract

Polypyrrole (PPy)-indium phosphide (InP) composite material was electrochemically prepared by the incorporation of InP into a PPy matrix during electrochemical synthesis (cycling) under magnetic stirring from the acetonitrile/LiClO4 electrolyte containing the Py and InP particles. The PPy-InP composite material was designed to explore new approaches to improve light-collection efficiency in polymer photovoltaic. The samples were characterised by cyclic voltammetry, impedance spectroscopy measurement, scanning electron microscopy, energy dispersive X-ray spectroscopy, UV-visible and photoelectrochemical measurements. It was observed that the photocurrent of the composites was higher than that of the single PPy films and increased with InP concentration. The study showed that the presence of InP particles in the polymeric film improves the optical and the photovoltaic properties of PPy and give information on the use possibility of these films for photovoltaic cells' application.

Optical absorption study of electrochemically synthesized polypyrrole(Ppy) thin films

“…This results matches with the earlier reported data [12], that the bands at nearly 421 nm resulting from the π to π* transition. And the large shoulder beyond the 800 nm , indicating that the conducting polymer is in oxidizes and conducting state [12,13].…”

“…And the large shoulder beyond the 800 nm , indicating that the conducting polymer is in oxidizes and conducting state [12,13].…”

Preparation and electrochemical behaviour of PPy–CdS composite films

“…However, in the case of the insoluble polymers, the dispersion of the nanoparticles is carried out by stirring during electropolymerization. We note that the previous similar studies [31][32][33] have shown that TiO 2 incorporation into PPy films during electrochemical synthesis under magnetic stirring in order to improve the composite performance to anticorrosion [34].…”

The improved photooxidation stability of the SILAR deposited copper sulfide on polypyrrole

“…Frank and Honda [10] observed that CdS covered with PPy and activated with the RuO 2 under anodic potentials of 0.4 V (vs. SCE) in 0.5 M Na 2 SO 4 increases the rate of the oxygen production from 1% for pure CdS, to 21% for PPy covered, and up to 68% for RuO 2 activated. Recently, different authors investigated the influence of the PPy on the photoelectrochemical behavior of some semiconductors, CdS [11], InP [12], Bi 2 S 3 [13,14] and GaAs [15]. In all the investigations, the PPy-semiconductor was prepared as a composite film, with semiconductor particles incorporated under mixing conditions, during pyrrole electropolymerization.…”