Electrical conductivity of organosilicon polymers III: Carrier mobility analysis of iodine-doped polysilane by hall effect measurement

Fukushima, Moriyuki; Tabei, Eiichi; Aramata, Mikio; Hamada, Yoshitaka; Mori, Shigeru; Yamämoto, Yasushi

doi:10.1016/s0379-6779(98)00100-3

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…The behavior of electrically conducting materials under the influence of a magnetic field applied at right angle to that of electric field is termed as Hall effect. A Hall effect can be used to determine the charge carrier concentration, their mobility and type ( n‐ type or p‐ type) of semiconductors 34–36. For negatively charged carriers ( n ‐type semiconductors) the Hall voltage as discussed below is positive and for positively charged carriers ( p ‐type semiconductors) the Hall voltage is negative.…”

Section: Resultsmentioning

confidence: 99%

Improvement of conductivity of electrochemically synthesized polyaniline

Bhadra

Chattopadhyay

Singha

et al. 2007

J of Applied Polymer Sci

127

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The electrochemical polymerization of aqueous solution of aniline and HCl was carried out in a single compartment electrochemical cell. After 2 h of the polymerization reaction, polarity of the electrodes was reversed and kept for 1 h. By this process the conductivity of the polyaniline (PAni) formed was found to increase dramatically from 1.1 × 10−4 to 3.0 × 10−1 S/cm. The PAni samples obtained both by reversing the polarity (“PANI‐R”) and without reversing the polarity (“PANI”) were characterized by the infrared spectroscopy (FT‐IR), thermogravimetric analysis (TGA), ultraviolet spectroscopy (UV), Hall effect experiment, X‐ray analysis (XRD) and scanning electron microscope (SEM). The results show that the increase in the conductivity of PAni through the reversion of polarity is due to the partial reduction of over oxidized sample giving more emeraldine base and hence more polaron formation with increased charge carrier density and its mobility. The degree of crystallinity and the crystallite size is decreased marginally and the d‐spacing is increased marginally due to this reduction. The PAni behaves like a p‐type semiconductor that means the majority current carriers are holes. A plausible reduction mechanism due to reversal of polarity during electrochemical polymerization is also proposed. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2008

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Section: Resultsmentioning

confidence: 99%

Improvement of conductivity of electrochemically synthesized polyaniline

Bhadra

Chattopadhyay

Singha

et al. 2007

J of Applied Polymer Sci

127

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“…The structure of the polymer was analyzed using IR (Nicolet-360), Raman Spectroscopy (SPEX 1403), 1 H-NMR (Bruker AC-80) and 29 Si CP/MAS NMR (Bruker DSX-300). Gel permeation chromatography (GPC, Water-244) was performed in THF solution at a flow rate of 0.5 ml/min and the molecular weights obtained were determined by reference to polystyrene standard.…”

Section: Characterizationmentioning

confidence: 99%

“…When the amount of Sb and Fe increased, the polymer become poor dissoluble and even turn to be insoluble and infusible because of the more complex crosslinking structures. 29 Si CP/MAS NMR spectra are shown in Fig. (2).…”

Section: Molecular Structures Of Aps and Ipsmentioning

confidence: 99%

“…The amount of Sb and Fe of the polymers influence on the conductivity is not very clear, the resistance of the doped film still at the level of 10 -5 S/cm. This can be explained by the "self-doping" mechanism [28,29], i.e., the inorganic side chains have strong electron donating or accepting properties.…”

Section: Semi-conductivities Of Aps and Ipsmentioning

confidence: 99%

“…The APS was synthesized directly by the reaction of PMS with SbCl 3 , while IPS was obtained from the reaction of PCMS with Na 2 Fe(CO) 4 in the solvent of n-hexane. The polymers were characterized by elemental analysis, FT-IR, 1 H-NMR, 29 Si CP/MAS NMR, GPC, and UV. The number average molecular weights of these two polymers are between 1400 and 1600.…”

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confidence: 99%

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Synthesis and Electronical Property of Antimony-Substituted Polysilanes and Iron-Substituted Polysilanes

Xing

Gguo²,

Liu³

et al. 2012

TOMSJ

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Novel polysilanes, antimony-substituted polysilanes (APS) and iron-substituted polysilanes (IPS), were synthesized and characterized in this paper. To prepare these new metal-containing polymers, high reactive polymers, polymethylsilane (PMS) and polychloromethylsilane (PCMS) were used as mother polymers. The APS was synthesized directly by the reaction of PMS with SbCl 3 , while IPS was obtained from the reaction of PCMS with Na 2 Fe(CO) 4 in the solvent of n-hexane. The polymers were characterized by elemental analysis, FT-IR, 1 H-NMR, 29 Si CP/MAS NMR, GPC, and UV. The number average molecular weights of these two polymers are between 1400 and 1600. These polymers show good semiconductive properties, whose intrinsic conductivities are in the range of 10 -8~1 0 -7 S/cm, and can be increased to10 -5 S/cm after being doped with iodine.

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