Electrochemical determination of the ionization potential and electron affinity of poly(9,9-dioctylfluorene)

被引:694
作者
Janietz, S
Bradley, DDC
Grell, M
Giebeler, C
Inbasekaran, M
Woo, EP
机构
[1] Fraunhofer Inst Appl Polymer Res, D-14513 Teltow, Germany
[2] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
[3] Univ Sheffield, Ctr Mol Mat, Sheffield S3 7RH, S Yorkshire, England
[4] Dow Chem Co, Cent & New Businesses R&D, Midland, MI 48674 USA
关键词
D O I
10.1063/1.122479
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report cyclic voltammetry measurements for the blue electroluminescent conjugated polymer poly(9,9-dioctylfluorene). Both oxidation and reduction potentials are determined and thus estimates of both the ionization potential I-p and electron affinity E-a of the polymer are obtained for the same sample under the same experimental conditions. We estimate I-p = 5.80 eV and E-a = 2.12 eV. These results disagree with the common assumption that E-a is, to good approximation, given by the difference between I-p and the optical gap. Measurements on indium tin oxide/polyfluorene/calcium light emitting diode structures are consistent with the deductions from the electrochemical data. (C) 1998 American Institute of Physics. [S0003-6951(98)00843-2].
引用
收藏
页码:2453 / 2455
页数:3
相关论文
共 28 条
  • [1] [Anonymous], CURR TRENDS POLYM SC
  • [2] Electroluminescent polymers: Materials, physics and device engineering
    Bradley, D
    [J]. CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE, 1996, 1 (06) : 789 - 797
  • [3] Influence of aggregation on the optical properties of a polyfluorene
    Bradley, DDC
    Grell, M
    Long, X
    Mellor, H
    Grice, A
    Inbasekaran, M
    Woo, EP
    [J]. OPTICAL PROBES OF CONJUGATED POLYMERS, 1997, 3145 : 254 - 259
  • [4] CHAIN-LENGTH DEPENDENCE OF ELECTRONIC AND ELECTROCHEMICAL PROPERTIES OF CONJUGATED SYSTEMS - POLYACETYLENE, POLYPHENYLENE, POLYTHIOPHENE, AND POLYPYRROLE
    BREDAS, JL
    SILBEY, R
    BOUDREAUX, DS
    CHANCE, RR
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1983, 105 (22) : 6555 - 6559
  • [5] LIGHT-EMITTING-DIODES BASED ON CONJUGATED POLYMERS
    BURROUGHES, JH
    BRADLEY, DDC
    BROWN, AR
    MARKS, RN
    MACKAY, K
    FRIEND, RH
    BURN, PL
    HOLMES, AB
    [J]. NATURE, 1990, 347 (6293) : 539 - 541
  • [6] Space-charge limited conduction with traps in poly(phenylene vinylene) light emitting diodes
    Campbell, AJ
    Bradley, DDC
    Lidzey, DG
    [J]. JOURNAL OF APPLIED PHYSICS, 1997, 82 (12) : 6326 - 6342
  • [7] Blue and green light emission from new soluble alternating copolymers
    Cho, HN
    Kim, DY
    Kim, YC
    Lee, JY
    Kim, CY
    [J]. ADVANCED MATERIALS, 1997, 9 (04) : 326 - +
  • [8] Grell M, 1998, ACTA POLYM, V49, P439, DOI 10.1002/(SICI)1521-4044(199808)49:8<439::AID-APOL439>3.0.CO
  • [9] 2-A
  • [10] A glass-forming conjugated main-chain liquid crystal polymer for polarized electroluminescence applications
    Grell, M
    Bradley, DDC
    Inbasekaran, M
    Woo, EP
    [J]. ADVANCED MATERIALS, 1997, 9 (10) : 798 - &