The morphological dependence of charge transport in a soluble luminescent conjugated polymer

被引:41
作者
Tan, CH
Inigo, AR
Fann, W
Wei, PK
Perng, GY
Chen, SA
机构
[1] Acad Sinica, Inst Atom & Mol Sci, Taipei, Taiwan
[2] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan
[3] Acad Sinica, Inst Appl Sci & Engn, Taipei 115, Taiwan
[4] Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 300, Taiwan
关键词
MEH-PPV; time-of-flight; morphology; near-field optical microscopy; hole mobility; luminent conjugated polymers;
D O I
10.1016/S1566-1199(02)00037-X
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Charge transport in poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] is studied by employing the time-of-flight technique. Film morphology plays a key role in determining the charge transport properties. Samples prepared from toluene feature non-dispersive transport. However, after thermal annealing, charge transport is no longer nondispersive and hole mobility drops for about one order of magnitude. Near-field scanning optical microscope images show that annealing enhanced film inhomogeneity. We propose that the inhomogeneity is responsible for the changes in the transport properties. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:81 / 88
页数:8
相关论文
共 33 条
  • [1] CHARGE TRANSPORT IN DISORDERED ORGANIC PHOTOCONDUCTORS - A MONTE-CARLO SIMULATION STUDY
    BASSLER, H
    [J]. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1993, 175 (01): : 15 - 56
  • [2] Dispersive hole transport in poly(p-phenylene vinylene)
    Blom, PWM
    Vissenberg, MCJM
    [J]. PHYSICAL REVIEW LETTERS, 1998, 80 (17) : 3819 - 3822
  • [3] Electron and hole transport in poly(p-phenylene vinylene) devices
    Blom, PWM
    deJong, MJM
    Vleggaar, JJM
    [J]. APPLIED PHYSICS LETTERS, 1996, 68 (23) : 3308 - 3310
  • [4] Optimum charge-carrier mobility for a polymer light-emitting diode
    Blom, PWM
    Vissenberg, MCJM
    Huiberts, JN
    Martens, HCF
    Schoo, HFM
    [J]. APPLIED PHYSICS LETTERS, 2000, 77 (13) : 2057 - 2059
  • [5] Charge transport in poly(p-phenylene vinylene) light-emitting diodes
    Blom, PWM
    Vissenberg, MCJM
    [J]. MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2000, 27 (3-4) : 53 - 94
  • [6] THE ROLE OF DISORDER ON CHARGE-TRANSPORT IN MOLECULARLY DOPED POLYMERS AND RELATED MATERIALS
    BORSENBERGER, PM
    MAGIN, EH
    VANDERAUWERAER, M
    DESCHRYVER, FC
    [J]. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 1993, 140 (01): : 9 - 47
  • [7] Temperature- and field-dependent electron and hole mobilities in polymer light-emitting diodes
    Bozano, L
    Carter, SA
    Scott, JC
    Malliaras, GG
    Brock, PJ
    [J]. APPLIED PHYSICS LETTERS, 1999, 74 (08) : 1132 - 1134
  • [8] 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
  • [9] Consistent time-of-flight mobility measurements and polymer light-emitting diode current-voltage characteristics
    Campbell, IH
    Smith, DL
    Neef, CJ
    Ferraris, JP
    [J]. APPLIED PHYSICS LETTERS, 1999, 74 (19) : 2809 - 2811
  • [10] DC AND TRANSIENT PHOTOCONDUCTIVITY OF POLY(2-PHENYL-1,4-PHENYLENEVINYLENE)
    GAILBERGER, M
    BASSLER, H
    [J]. PHYSICAL REVIEW B, 1991, 44 (16): : 8643 - 8651