CHARACTERIZATION OF THE INTRACHAIN CHARGE-GENERATION MECHANISM OF ELECTRONICALLY CONDUCTIVE POLY (3-METHYLTHIOPHENE)

被引:76
作者
SUN, ZW [1 ]
FRANK, AJ [1 ]
机构
[1] SOLAR ENERGY RES INST,GOLDEN,CO 80401
关键词
D O I
10.1063/1.460588
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The charge carriers and band structure that evolve upon doping of electrochemically grown poly (3-methylthiophene) (PMeT) films are characterized as a function of film preparation conditions by optical absorption, infrared, and electron spin resonance measurements. Regardless of the solvent (acetonitrile or propylene carbonate) or dopant anion (ClO4-, PF6-, BF4-, or CF3SO3-) used in preparing these films, bipolarons are found to play a prominent role in the charge-generation mechanism of PMeT at doping levels above 2 mol %. At low doping concentrations (< 2 mol %), structural disorder effects in the polymer are evident. The amount of structural disorder depends on the nature of the solvent and dopant anion. The binding energy of bipolarons to dopant anions was evaluated and found to be independent of the identity of the dopant anion. Solvent-dependent shifts in the bipolaron gap states and the binding energy are observed. These results are interpreted in terms of current theories of charge-carrier production in conductive polymers.
引用
收藏
页码:4600 / 4608
页数:9
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共 57 条
  • [31] SOLUBLE CONDUCTING POLYMERS BY ELECTROCHEMICAL POLYMERIZATION OF THIOPHENES HAVING LONG ALKYL SUBSTITUENTS
    SATO, MA
    TANAKA, S
    KAERIYAMA, K
    [J]. SYNTHETIC METALS, 1987, 18 (1-3) : 229 - 232
  • [32] INFRARED ACTIVITY OF PHOTOEXCITATIONS IN POLYTHIOPHENE
    SCHAFFER, HE
    HEEGER, AJ
    [J]. SOLID STATE COMMUNICATIONS, 1986, 59 (07) : 415 - 421
  • [33] ELECTRON-SPIN-RESONANCE OF BF4--DOPED POLYTHIOPHENE
    SCHARLI, M
    KIESS, H
    HARBEKE, G
    BERLINGER, W
    BLAZEY, KW
    MULLER, KA
    [J]. SYNTHETIC METALS, 1988, 22 (04) : 317 - 336
  • [34] INFRAROT-UNTERSUCHUNGEN AN 2.5-DISUBSTITUIERTEN THIOPHENEN
    SCHULTE, KE
    KREUTZBERGER, A
    BOHN, G
    [J]. CHEMISCHE BERICHTE-RECUEIL, 1964, 97 (12): : 3263 - &
  • [35] Sharpe A.G., 1986, INORGANIC CHEM
  • [36] Silverstein R. M., 1974, SPECTROMETRIC IDENTI
  • [37] HYDROGEN-BOND STUDIES .73. CRYSTAL-STRUCTURE OF TRIFLUOROMETHANESULFONIC ACID MONHYDRATE, H3O+CF3SO3-, AT 298 AND 83 DEGREES K
    SPENCER, JB
    LUNDGREN, JO
    [J]. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1973, 29 (SEP15): : 1923 - 1928
  • [38] SOLITON EXCITATIONS IN POLYACETYLENE
    SU, WP
    SCHRIEFFER, JR
    HEEGER, AJ
    [J]. PHYSICAL REVIEW B, 1980, 22 (04): : 2099 - 2111
  • [39] SOLITONS IN POLYACETYLENE
    SU, WP
    SCHRIEFFER, JR
    HEEGER, AJ
    [J]. PHYSICAL REVIEW LETTERS, 1979, 42 (25) : 1698 - 1701
  • [40] CORRELATION-EFFECTS ON THE ELECTRONIC-STRUCTURE OF HIGHLY CONDUCTING POLYMERS
    SUHAI, S
    [J]. SYNTHETIC METALS, 1987, 17 (1-3) : 189 - 196