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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.
Citations
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Journal ArticleDOI
TL;DR: The most important examples from major classes of electrochromic materials namely transition metal oxides, Prussian blue, phthalocyanines, viologens, fullerenes, dyes and conducting polymers (including gels) are described in this article.

743 citations

Journal ArticleDOI
TL;DR: In this article, new electrochemical sensors for dopamine (DA) and phenol derivative, based on hybrid inorganic redox material-organic conducting polymers, were developed, which exhibited a linear response over wide range of 4-nitrophenol concentrations from 30 to 90μM, with a detection limit of 8.23μM (s/n = 3).

118 citations

Journal ArticleDOI
TL;DR: In this paper, the electrochemical properties of a bilayer consisting of iron(III) hexacyanoferrate, well known as Prussian Blue, and poly[4,4 · -bis(butylsulphanyl)-2,2 · -bithiophene on a platinum electrode are investigated.

54 citations

Journal ArticleDOI
TL;DR: In this paper, a self-degraded template was used to synthesize polypyrrole (PPy)/PB and PPy/Ag composite microtubes in one pot.
Abstract: Polypyrrole (PPy)/PB and PPy/Ag composite microtubes were synthesized in one pot by using methyl orange (MO) as a reactive self-degraded template. In contrast to reported conventional template approaches, the MO template did not need to be removed after polymerization. The formation mechanism, structural characteristics, conductivity, and electrochemical properties of the obtained PPy/PB and PPy/Ag microtubes are reported.

52 citations

Journal ArticleDOI
TL;DR: In this article, the authors present an overview of common pigments found in natural dyes, extraction methods, the general efficiency of natural dye sensitizers, the types of natural Dyes used in water splitting and membranes used as protective layers.
Abstract: The development of titanium dioxide-based semiconductors has been widely studied due to the efficiency of this material in photoelectrochemical water splitting. However, the large band gap of titanium dioxide can only absorb UV light, thus reducing its performance in photoelectrochemical applications. Moreover, the recombination of electron-hole pairs also affects the efficiency of phototelectrochemical reactions. Thus, many efforts have been made to enhance the performance of titanium dioxide, and considerable attention has been focused on dye sensitizers, particularly natural dyes, due to their environmental friendliness and low cost. In addition, dye sensitizers exhibit fast electron injection and slow backward reactions. However, natural dye sensitizers are unstable in solution, thus requiring a protective layer, such as a conductive polymer layer. This paper presents an overview of common pigments found in natural dyes, extraction methods, the general efficiency of natural dyes, the types of natural dyes used in water splitting and membranes used as protective layers.

50 citations

References
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Journal ArticleDOI
TL;DR: In this paper, the performance of electrochemical doping of colloidal Prussian Blue (hereafter abbreviated as PB) into polypyrrole films was described, together with the doping conditions and the redox behavior of the resulting PB-doped polypryl-polypoly(n) in aqueous alkali metal chloride solutions.

34 citations

Journal ArticleDOI
TL;DR: In this paper, the thermal sensitization process for the enhancement of photoconductivity in tetragonal lead monoxide has been investigated, and at a critical annealing temperature the photosensitivity has a maximum value (≅5×102) while the conductivity is observed to have a minimum value (approximately 10−10 cm).
Abstract: The thermal sensitization process for the enhancement of photoconductivity in tetragonal lead monoxide has been investigated. At a critical annealing temperature the photosensitivity has been found to have a maximum value (≅5×102) while the conductivity is observed to have a minimum value (≅10−10Ω cm). The transient response of the photocurrent exhibits an overshoot, the height of which is strongly dependent on the annealing temperature. These and other findings have been explained on the basis of sensitization due to the creation of two types of centres in the material.

34 citations

Journal ArticleDOI
TL;DR: An electroluminescent device was constructed using tris(8-hydroxyquinoline)aluminum as an emitting layer and metallophthalocyanine as a hole-transfer layer as discussed by the authors.
Abstract: An electroluminescent device was constructed using tris(8-hydroxyquinoline)aluminum as an emitting layer and metallophthalocyanine as a hole-transfer layer. When the metallophthalocyanine layer is sufficiently thin, the device shows a brightness of more than 1000 cd m−2. The device using double hole-transfer layers of two kinds of metallophthalocyanine exhibits a higher brightness than that using a single hole-transfer layer of the corresponding metallophthalocyanine. This phenomenon is well explained by the accelerated hole transfer in the double layer due to the construction of a “sequential potential field.”

29 citations

Journal ArticleDOI
TL;DR: In this article, the effect of small concentration of dispersed prussian blue (PB) [in solid polymer electrolyte viz polyvinyl alcohol (PVA) with phosphoric acid] on the photocurrents were studied.

29 citations