Impedance and electroreflectance of reduced poly (3-methyl thiophene)-P3MT in an aqueous electrolyte: Direct observation of a polaron transition

Journal Article · Wed Apr 01 04:00:00 EST 1987 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2100591· OSTI ID:6239333

Yuan, R K; Peramunage, D; Tomkiewicz, M

The authors present electrolyte electroreflectance and impedance studies of poly (3-methyl thiophene) in contact with an aqueous solution of methyl viologen. When the doping level of the polymer is reduced from its ''as grown'' value a new structure, at 1.7 eV, appears in the electroreflectance spectra which corresponds to the anticipated optical transitions due to the polaron gap states. The polaron spectra are absent in the fully doped and the neutral, ''undoped,'' polymer. The polaron spectra have been monitored as a function of the electrode potential. The electroreflectance results are correlated with impedance measurements and with the photoelectrochemical spectral response of the film as a function of the doping level.

• Research Organization: Dept. of Physics, Brooklyn College of City Univ. of New York, Brooklyn, NY 11210
• OSTI ID: 6239333
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 134:4; ISSN JESOA
• Country of Publication: United States
• Language: English

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14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
ALKYL RADICALS
AQUEOUS SOLUTIONS
AZINES
BIPYRIDINES
CRYSTAL DOPING
DISPERSIONS
ELECTRIC IMPEDANCE
ELECTRIC POTENTIAL
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
ENERGY GAP
ENERGY RANGE
EQUIPMENT
EV RANGE
EV RANGE 01-10
FILMS
HETEROCYCLIC COMPOUNDS
IMPEDANCE
METHYL RADICALS
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MONITORING
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHOTOELECTROCHEMICAL CELLS
PHYSICAL PROPERTIES
POLARONS
POLYMERS
PYRIDINES
QUASI PARTICLES
RADICALS
REFLECTIVITY
SOLAR EQUIPMENT
SOLUTIONS
SPECTRA
SURFACE PROPERTIES
THIN FILMS
THIOPHENE