Photophysics of substituted polythiophenes

被引:137
作者
Theander, M [1 ]
Inganäs, O
Mammo, W
Olinga, T
Svensson, M
Andersson, MR
机构
[1] Linkoping Univ, Dept Phys, IFM, S-58183 Linkoping, Sweden
[2] Chalmers Univ Technol, Dept Polymer Technol, S-41296 Gothenburg, Sweden
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 37期
关键词
D O I
10.1021/jp983684u
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
We have measured the photoluminescence quantum yield and photoluminescence lifetime for a series of polythiophenes, in solution, and the quantum yield for the same polymers in thin films. Depending on the different substituents, quantum yields ranged between 0.38 and 0.01 for polymers dissolved in chloroform; for spin-coated films, quantum yields as high as 0.24 were measured. We observe that increasing the bulkiness of the substituent increases the quantum yield in solution. For spin-coated films an increased ordering can either increase or decrease the quantum yield, depending on the separation of the conjugated backbones. Polythiophenes in which the electronic band gap is increased by steric hindrance show very low quantum yield, both for film and solution. This low quantum yield originates from a fast nonradiative decay.
引用
收藏
页码:7771 / 7780
页数:10
相关论文
共 40 条
  • [1] REGIOSELECTIVE POLYMERIZATION OF 3-(4-OCTYLPHENYL)THIOPHENE WITH FECL3
    ANDERSSON, MR
    SELSE, D
    BERGGREN, M
    JARVINEN, H
    HJERTBERG, T
    INGANAS, O
    WENNERSTROM, O
    OSTERHOLM, JE
    [J]. MACROMOLECULES, 1994, 27 (22) : 6503 - 6506
  • [2] ELECTROLUMINESCENCE FROM SUBSTITUTED POLY(THIOPHENES) - FROM BLUE TO NEAR-INFRARED
    ANDERSSON, MR
    BERGGREN, M
    INGANAS, O
    GUSTAFSSON, G
    GUSTAFSSONCARLBERG, JC
    SELSE, D
    HJERTBERG, T
    WENNERSTROM, O
    [J]. MACROMOLECULES, 1995, 28 (22) : 7525 - 7529
  • [3] Comprehensive evaluation of the absorption, photophysical, energy transfer, structural, and theoretical properties of alpha-oligothiophenes with one to seven rings
    Becker, RS
    deMelo, JS
    Macanita, AL
    Elisei, F
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (48) : 18683 - 18695
  • [4] GREEN ELECTROLUMINESCENCE IN POLY-(3-CYCLOHEXYLTHIOPHENE) LIGHT-EMITTING-DIODES
    BERGGREN, M
    GUSTAFFSON, G
    INGANAS, O
    ANDERSSON, MR
    WENNERSTROM, O
    HJERTBERG, T
    [J]. ADVANCED MATERIALS, 1994, 6 (06) : 488 - 490
  • [5] Polymer light-emitting diodes placed in microcavities
    Berggren, M
    Inganas, O
    Granlund, T
    Guo, S
    Gustafsson, G
    Andersson, MR
    [J]. SYNTHETIC METALS, 1996, 76 (1-3) : 121 - 123
  • [6] Relaxation processes in thiophene-based random copolymers
    Bongiovanni, G
    Loi, MA
    Mura, A
    Piaggi, A
    Luzzati, S
    Catellani, M
    [J]. CHEMICAL PHYSICS LETTERS, 1998, 288 (5-6) : 749 - 754
  • [7] TIME-RESOLVED FLUORESCENCE STUDIES ON THIOPHENE OLIGOMERS IN SOLUTION
    CHOSROVIAN, H
    RENTSCH, S
    GREBNER, D
    DAHM, DU
    BIRCKNER, E
    NAARMANN, H
    [J]. SYNTHETIC METALS, 1993, 60 (01) : 23 - 26
  • [8] Interchain photoluminescence in poly(phenylene vinylene) derivatives
    Conwell, EM
    Perlstein, J
    Shaik, S
    [J]. PHYSICAL REVIEW B, 1996, 54 (04) : R2308 - R2310
  • [9] Drexhage K. H., 1990, DYE LASERS
  • [10] Photothermal beam deflection spectroscopy in the near IR on poly[3-alkylthiophene]s
    Einsiedel, H
    Kreiter, M
    Leclerc, M
    Mittler-Neher, S
    [J]. OPTICAL MATERIALS, 1998, 10 (01) : 61 - 68