Photoelectrical, optical, and transport properties of poly (3-hexylthiophene)-zinc sulfide hybrid nanocomposites

Abstract

We have synthesized nanocomposites of poly (3-hexylthiophene) (P3HT) at 273 K and zinc sulfide (ZnS) nanoparticles at 353 K by the chemical route method. The synthesis of these nanocomposites is confirmed by UV-visible, high resolution transmission electron microscope, and Raman spectroscopy. We have measured photocurrent of P3HT using 50 W tungsten lamp. The photoconductivity increases with concentration of ZnS in P3HT-ZnS composite. Temperature dependent dc conductivity of P3HT and its nanocomposites have been thoroughly investigated in light of Mott's variable range hopping.

Effect of charge carrier transport on sulfur dioxide monitoring performance of highly porous polyaniline nanofibres

“…The TGA curve consists of three phases of weight loss. The first phase (below 100 °C) is attributed to loss of water, the second phase (250 to 450 °C) corresponds to the loss of dopant and the final phase is assigned to the degradation of PAN backbone chains …”

“…As the transport of charge carriers produced during the sensing process and the transport of intrinsic charge carriers together constitute the sensing signal, it is very necessary to study the charge carrier transport mechanism of the sensing material. To test the DC conduction behaviour of the fabricated PAN chemiresistors, the Van der Pauw method was used . One of the primary tools for studying the charge transport phenomenon is the measurement of the temperature dependence of conductivity.…”

“…CPs like PAN can be classified as disordered materials due to the absence of sharp band edges in forbidden gap, and all the models used to interpret their conduction behaviour have been adopted from the theory of amorphous semiconductors and granular metals . The transport of charge carriers (mainly polarons) in PAN is predominantly directed by the hopping of polarons from one localized state to another.…”

“…The transport of charge carriers (mainly polarons) in PAN is predominantly directed by the hopping of polarons from one localized state to another. During hopping, there is a transfer of energy amongst the hopping charge carriers and the lattice by phonon transfer process . The hopping of charge carriers in various dimensions (one, two, three dimensions or fractals) results in a temperature dependence of conductivity .…”

“…Thus, one of the primary tools for studying the transport of charge carriers (polarons) in PAN is the measurement of the conductivity as a function of temperature. Although the conduction behaviour in PAN is well studied, studies of the monitoring of SO x by PAN using the chemiresistive technique have been seldom reported …”