Influence of FeCl3 dopant on the electrical conductivity of pyrolysed aromatic polymers

Simitzis, J.; Zoumpoulakis, L.

doi:10.1007/bf00357872

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…The volume of the unit cell of the doped copolymers increases slightly compared with the corresponding undoped copolymers. The dopant FeCl 3 causes oxidation of the polyphenylenes according to the reaction 53,54 :…”

Section: And 41mentioning

confidence: 99%

Synthesis and characterization of electrically conducting copolymers based on benzene and biphenyl

Simitzis

Triantou

Soulis

2008

J of Applied Polymer Sci

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Poly(p‐phenylene) (H‐PPP), which is one of the firstly investigated conducting polymer, has the disadvantage of difficult processability because it is infusible and insoluble. The use of biphenyl instead of benzene leads to ortho‐, meta‐, para‐polyphenylenes (H‐PP) which are more soluble and easier to be processed, however their electrical conductivity is lower. Copolymers of polyphenylenes (C1 and C2) and corresponding homopolymers (H‐PPP and H‐PP) were produced by the oxidative cationic polymerization of benzene and/or biphenyl. The soluble (‐S) and the insoluble (‐I) in chlorobenzene polyphenylenes were separated (H‐PP‐I, H‐PP‐S, C1‐I, C1‐S, C2‐I, and C2‐S) and they were doped with a solution of FeCl3. All polyphenylenes were studied by FTIR, XRD, TGA, and their electrical conductivity with constant current was determined. Pronounced differences between the copolymers and the homopolymers were observed, indicating the different structure of the former. The values of the electrical conductivity of doped insoluble copolymers (10−4 and 10−5 S/cm) are between that of H‐PPP (10−3 S/cm) and H‐PP‐I (10−6 S/cm). The values of the electrical conductivity of doped soluble copolymers (10−5 S/cm) are considerably higher than that of H‐PP‐S (10−9 S/cm). The new electrically conductive polyphenylenes that were produced differ significantly from the corresponding homopolymers and combine good electrical conductivity and solubility. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

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Section: And 41mentioning

confidence: 99%

Synthesis and characterization of electrically conducting copolymers based on benzene and biphenyl

Simitzis

Triantou

Soulis

2008

J of Applied Polymer Sci

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“…In order to improve the electrical conductivity, sensitization with nitromethane ferric chloride (FeCl 3 ) solutions was proposed in References [13][14][15]. Being a cheap chemical oxidation agent, FeCl 3 is able to diffuse through polymer chains, acting like a p-type material.…”

Section: Introductionmentioning

confidence: 99%

“…Being a cheap chemical oxidation agent, FeCl 3 is able to diffuse through polymer chains, acting like a p-type material. The physical properties of polymer can be modified because of the π-electron delocalization, allowing intercalation of new molecules between the polymer chains, without damaging the initial structure [13]. The efficiency of this sensitization process is related to the polymer thin-film thickness [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

On the Electrical and Optical Properties Stability of P3HT Thin Films Sensitized with Nitromethane Ferric Chloride Solutions

et al. 2020

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The electrical and optical properties stability of poly(3-hexylthiophene) (P3HT) thin films sensitized with nitromethane ferric chloride (FeCl3) solution was investigated. The optical properties modifications were studied by spectrophotometry and ellipsometry. For electrical characterizations, electrical resistivity measurements were performed. In agreement with the observations of other authors, an important decrease in the electrical resistivity by six orders of magnitude was noticed. In addition, the repeatability and stability of this phenomenon were investigated over a few weeks after sensitization and during different cycles of heating and cooling, both in the dark and under illumination.

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“…The use of pyrolytic carbons as electrodes is correlated to their high conductivity, which is influenced by their heat treatment [1]. Ordering effects and the formation of graphitic layers at higher temperatures can be investigated by XRD analysis [1,2,3] and complementary FTIR-and Ramanspectroscopic techniques [3,4]. In addition, changes in defect concentration can be monitored effectively by PL spectroscopy [5].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, polycrystalline graphites and carbon have covalent cross-links between graphitic sheets in neighboring crystals which allow them to exist as coherent materials of significant strength. The use of pyrolytic carbons as electrodes is correlated to their high conductivity, which is influenced by their heat treatment [1]. Ordering effects and the formation of graphitic layers at higher temperatures can be investigated by XRD analysis [1,2,3] and complementary FTIR-and Ramanspectroscopic techniques [3,4].…”

Section: Introductionmentioning

confidence: 99%

Structural and optical characterization of pyrolytic carbon derived from novolac resin

et al. 2004

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The structural and optical properties of technologically interesting pyrolytic carbons formed from cured novolac resin and cured novolac/biomass composites were studied by X-Ray Diffraction Analysis (XRD), and Fourier Transform Infrared (FTIR), Raman and Photoluminescence (PL) spectroscopy. Pyrolysis of the cured materials took place at temperatures in the range 400-1000 degrees C. The most important weight loss, shrinkage and structural changes of pyrolyzed composites are observed at temperatures up to 600 degrees C due to the olive stone component. In the same temperature range, the changes in pyrolyzed novolac are smaller. The spectroscopic analysis shows that novolac pyrolyzed up to 900 ( degrees )C has less defects and disorder than the composites. However, above 900 ( degrees )C, pyrolyzed novolac becomes more disordered compared to the pyrolyzed composites. It is concluded that partial replacement of novolac by olive stone in the composite materials leads to the formation of a low cost, good quality product.

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Influence of FeCl3 dopant on the electrical conductivity of pyrolysed aromatic polymers

Cited by 6 publications

References 22 publications

Synthesis and characterization of electrically conducting copolymers based on benzene and biphenyl

Synthesis and characterization of electrically conducting copolymers based on benzene and biphenyl

On the Electrical and Optical Properties Stability of P3HT Thin Films Sensitized with Nitromethane Ferric Chloride Solutions

Structural and optical characterization of pyrolytic carbon derived from novolac resin

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