Uv-Vis./NIR and transport studies of chemically synthesized soluble polypyrrole

E. J. Oh; K. S. Jang; J. S. Suh; H. Kim; K. H. Kim; C. H. Yo; J. Joo

doi:10.1016/s0379-6779(97)80686-8

Uv-Vis./NIR and transport studies of chemically synthesized soluble polypyrrole

E. J. Oh, K. S. Jang, J. S. Suh, H. Kim, K. H. Kim, C. H. Yo, J. Joo

Department of Physics

Research output: Contribution to journal › Article

20 Citations (Scopus)

Abstract

Doped polypyrrole which is soluble in various organic solvents (m-cresol, chloroform, DMSO, NMP etc.) is synthesized. Homogeneous solutions prepared from the solvents show different behaviors at near IR region depending on the solvent used. The results may be explained by PPy conformation change depending on polarity and aromatic interaction of solvents and dopants. Amorphous X-ray diffraction pattern is observed in flexible free standing films cast from these solutions. The electrical conductivity of the materials is 10^-2 ≃ 10⁰S/cm at room temperature. Temperature dependence of dc conductivity (δ_dc) indicates that these materials show the three dimensional variable range hopping (VRH) model and show the relatively strong localization of charge. From the EPR experiment of PPy-NSA (m-cresol) sample, the density of state of the system is estimated as ≃0.06 states/eV ring.

Original language	English
Pages (from-to)	147-148
Number of pages	2
Journal	Synthetic Metals
Volume	84
Issue number	1-3
DOIs	https://doi.org/10.1016/s0379-6779(97)80686-8
Publication status	Published - 1997 Jan

Keywords

Conductivity
Polypyrrole and derivatives
Solution processing
Transport measurements
UV-Vis-NIR absorption

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Uv-Vis./NIR and transport studies of chemically synthesized soluble polypyrrole",

abstract = "Doped polypyrrole which is soluble in various organic solvents (m-cresol, chloroform, DMSO, NMP etc.) is synthesized. Homogeneous solutions prepared from the solvents show different behaviors at near IR region depending on the solvent used. The results may be explained by PPy conformation change depending on polarity and aromatic interaction of solvents and dopants. Amorphous X-ray diffraction pattern is observed in flexible free standing films cast from these solutions. The electrical conductivity of the materials is 10-2 ≃ 100S/cm at room temperature. Temperature dependence of dc conductivity (δdc) indicates that these materials show the three dimensional variable range hopping (VRH) model and show the relatively strong localization of charge. From the EPR experiment of PPy-NSA (m-cresol) sample, the density of state of the system is estimated as ≃0.06 states/eV ring.",

keywords = "Conductivity, Polypyrrole and derivatives, Solution processing, Transport measurements, UV-Vis-NIR absorption",

author = "Oh, {E. J.} and Jang, {K. S.} and Suh, {J. S.} and H. Kim and Kim, {K. H.} and Yo, {C. H.} and J. Joo",

year = "1997",

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doi = "10.1016/s0379-6779(97)80686-8",

language = "English",

volume = "84",

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TY - JOUR

T1 - Uv-Vis./NIR and transport studies of chemically synthesized soluble polypyrrole

AU - Oh, E. J.

AU - Jang, K. S.

AU - Suh, J. S.

AU - Kim, H.

AU - Kim, K. H.

AU - Yo, C. H.

AU - Joo, J.

PY - 1997/1

Y1 - 1997/1

N2 - Doped polypyrrole which is soluble in various organic solvents (m-cresol, chloroform, DMSO, NMP etc.) is synthesized. Homogeneous solutions prepared from the solvents show different behaviors at near IR region depending on the solvent used. The results may be explained by PPy conformation change depending on polarity and aromatic interaction of solvents and dopants. Amorphous X-ray diffraction pattern is observed in flexible free standing films cast from these solutions. The electrical conductivity of the materials is 10-2 ≃ 100S/cm at room temperature. Temperature dependence of dc conductivity (δdc) indicates that these materials show the three dimensional variable range hopping (VRH) model and show the relatively strong localization of charge. From the EPR experiment of PPy-NSA (m-cresol) sample, the density of state of the system is estimated as ≃0.06 states/eV ring.

AB - Doped polypyrrole which is soluble in various organic solvents (m-cresol, chloroform, DMSO, NMP etc.) is synthesized. Homogeneous solutions prepared from the solvents show different behaviors at near IR region depending on the solvent used. The results may be explained by PPy conformation change depending on polarity and aromatic interaction of solvents and dopants. Amorphous X-ray diffraction pattern is observed in flexible free standing films cast from these solutions. The electrical conductivity of the materials is 10-2 ≃ 100S/cm at room temperature. Temperature dependence of dc conductivity (δdc) indicates that these materials show the three dimensional variable range hopping (VRH) model and show the relatively strong localization of charge. From the EPR experiment of PPy-NSA (m-cresol) sample, the density of state of the system is estimated as ≃0.06 states/eV ring.

KW - Conductivity

KW - Polypyrrole and derivatives

KW - Solution processing

KW - Transport measurements

KW - UV-Vis-NIR absorption

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JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

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