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Journal ArticleDOI

Charge transport processes in conducting polypyrrole/Prussian Blue bilayers

28 Jul 2002-Materials Chemistry and Physics (Elsevier)-Vol. 76, Iss: 1, pp 15-19
TL;DR: In this article, the electronic transport properties of electrochemically deposited conducting polypyrrole (PPy)/Prussian Blue (PB) bilayer films have been studied by investigating the currentvoltage (I-V) characteristics in dark and under white light illumination.
About: This article is published in Materials Chemistry and Physics.The article was published on 2002-07-28. It has received 28 citations till now. The article focuses on the topics: Prussian blue & Space charge.
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Journal ArticleDOI
16 Apr 2021
TL;DR: An in-depth analysis of the behavior of the electric transport was conducted and the correlated barrier hopping (CBH) conduction mechanism was shown to be the most suitable predominant conduction mechanisms for PdPc(Imz)4.
Abstract: In this study, we investigated the potential of palladium tetrakis (imidazole) phthalocyanine (PdPc(Imz)4) for use as an organic semiconductor for improving the photovoltaic performance. In order to get more information about the prevailing model of the conduction mechanism (correlated barrier hopping (CBH)) for PdPc(Imz)4, electrical impedance measurements were performed at different temperatures and the obtained data were simulated by the Kohlraush Williams Watt (KWW) approach. Theoretical studies (density functional theory (DFT)) were performed and molecular electrostatic potential (MEP) maps were also extracted to understand the relationship between the molecular structures and the molecular electronic structure of PdPc(Imz)4 and its semiconductor properties. Furthermore, studies on the AC electrical process as a function of temperature highlighted a hopping charge transport according to an equivalent electrical circuit composed of a parallel constant-phase element (CPE), capacitance in the grain boundary layer (Cg), and resistance of the grain boundary (Rg). To improve interpretation of the results, an in-depth analysis of the behavior of the electric transport was conducted. As a result, the correlated barrier hopping (CBH) conduction mechanism was shown to be the most suitable predominant conduction mechanism.

11 citations

Journal ArticleDOI
TL;DR: In this article, Hexagonal tungsten bronze (HTB) nanocrystal and TiO2 nanoparticles were assembled into thin films by layer-by-layer self-assembly method.

10 citations

Journal ArticleDOI
TL;DR: In this paper, the synthesis of polypyrrole (PPy)/AgCl nanocomposites with their size ranging around 70-100nm is achieved by using magnetic ionic liquid as the oxidant in the interface polymerization system.
Abstract: The synthesis of polypyrrole (PPy)/AgCl nanocomposites with their size ranging around 70–100 nm are achieved by using magnetic ionic liquid as the oxidant in the interface polymerization system. The interface polymerization leads to the formation of uniform and unaggregated nanocomposites with a relatively narrow size distribution confined to submicrometer-sized domains. The morphology and structure of the nanocomposites are characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, and X-ray diffraction (XRD). The potential application of PPy/AgCl nanocomposites as a H2O2 biosensor is also reported. Copyright © 2010 John Wiley & Sons, Ltd. Erratum: Magnetic ionic liquid-assisted synthesis of polypyrrole/AgCl nanocomposites

10 citations

Journal ArticleDOI
TL;DR: In this paper, a two-step method for the preparation and characterization of a hybrid material consisting of poly(3,4-ethylenedioxythiophene) (PEDOT) conducting polymer and Prussian Blue (PB; iron(III) hexacyanoferrate(II)) is presented.
Abstract: The electrochemical preparation, characterization and analytical applications of a hybrid material consisting of poly(3,4-ethylenedioxythiophene) (PEDOT) conducting polymer and Prussian Blue (PB; iron(III) hexacyanoferrate(II)) are presented. The hybrid material was prepared by a two-steps method. In a first step, the organic conducting polymer coating was deposited onto platinum electrode surface from an aqueous solution containing the monomer and ferricyanide ions. In the second step, the resulted modified electrode Pt|PEDOT- FeCN was immersed in an aqueous solution containing Fe 3+ ions and the electrode potential was cycled between 0.6 and –0.4 V. The in situ formation of PB inside the PEDOT matrix has been demonstrated using cyclic voltammetry and electrochemical quartz crystal microbalance. The hybrid material maintains the electrochemical features of each component, i.e. organic and inorganic components. The inorganic component showed electrochemical activity only for the Prussian blue/Everitt’s salt redox system. The hybrid material displayed electrocatalytic activity towards dopamine oxidation in the presence of a large excess of ascorbic acid.

9 citations

Journal ArticleDOI
TL;DR: In this paper, the properties of poly-o-phenylenediamine (PPD) and polyaniline (polyanilines) have been studied on PPD-modified electrodes.
Abstract: Spectroelectrochemical properties of poly-o-phenylenediamine (PPD) and the synthesized composite of PPD and polyaniline—two chemically related polymers containing an amino-substituted benzene ring but having different conduction nature—are studied. The polyaniline synthesis on PPD-modified electrodes involves stages of the reaction initiation, the copolymer formation, and the formation of a polyaniline layer at the copolymer/solution interface.

9 citations

References
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Journal ArticleDOI
TL;DR: In this article, a stable organic electroluminescent devices based on vapor-deposited Alq thin films have been achieved, which are derived from several factors including: (1) a multilayer thin-film structure with a CuPc stabilized hole-injection contact, (2) a hole-transport diamine layer using a naphthyl substituted benzidine derivative, and (3) an ac drive wave form.
Abstract: Highly stable organic electroluminescent devices based on vapor‐deposited Alq thin films have been achieved. The improvement in stability is derived from several factors including: (1) a multilayer thin‐film structure with a CuPc stabilized hole‐injection contact, (2) a hole‐transport diamine layer using a naphthyl‐substituted benzidine derivative, and (3) an ac drive wave form. These emissive devices have shown an operational half‐lifetime of about 4000 h from an initial luminance of 510 cd/m2.

1,559 citations

BookDOI
01 Jan 1993
TL;DR: In this article, electrical and electrochemical properties of ion conducting polymers are discussed. But they do not consider the properties of polymers with polymer electrolytes, as they do in this paper.
Abstract: Preface. Electrical and electrochemical properties of ion conducting polymers. Electrical and electrochemical properties of electronically conducting polymers. Highly-conductive polymer electrolytes. Solvation mechanisms in low molecular weight polyethers. Lithium batteries with polymer electrodes. Lithium polymer batteries. Electrochromic devices. Laminated electrochromic displays and windows. Functionalized conductive polymer membranes/films. Electroactive polymers in chemical sensors.

824 citations

Journal ArticleDOI
TL;DR: The most advanced organic light emitting diode (LED) technology has reached a point where performance levels are adequate for a number of applications as discussed by the authors, and a review examines the key scientific issues that underlie the operation of such LEDs.

256 citations