Device performance and polymer morphology in polymer light emitting diodes: The control of device electrical properties and metal/polymer contact

被引:125
作者
Liu, J [1 ]
Shi, YJ [1 ]
Ma, LP [1 ]
Yang, Y [1 ]
机构
[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
关键词
D O I
10.1063/1.373799
中图分类号
O59 [应用物理学];
学科分类号
摘要
We recently demonstrated that the morphology of a spin-cast polymer film can be controlled by the proper choice of solvent, polymer solution concentration, and spin speed [Y. Shi, J. Liu, and Y. Yang, J. Appl. Phys. 87, 4254 (2000)]. In this article, we report the correlation between the morphology and the electrical properties of poly(2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene based light emitting diodes. The performance of these devices, such as device turn-on voltage, current injection efficiency, and quantum efficiency, shows a strong dependence on thin film processing conditions. It is found that aromatic solvents and nonaromatic solvents have very different effects on device performance, which suggests that the solvation induced morphology effect is one of the controlling factors for polymer-based optoelectronic devices. (C) 2000 American Institute of Physics. [S0021-8979(00)07214-5].
引用
收藏
页码:605 / 609
页数:5
相关论文
共 21 条
  • [1] BOLM PWM, 1997, APPL PHYS LETT, V71, P930
  • [2] VISIBLE-LIGHT EMISSION FROM SEMICONDUCTING POLYMER DIODES
    BRAUN, D
    HEEGER, AJ
    [J]. APPLIED PHYSICS LETTERS, 1991, 58 (18) : 1982 - 1984
  • [3] 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
  • [4] Direct measurement of conjugated polymer electronic excitation energies using metal/polymer/metal structures
    Campbell, IH
    Hagler, TW
    Smith, DL
    Ferraris, JP
    [J]. PHYSICAL REVIEW LETTERS, 1996, 76 (11) : 1900 - 1903
  • [5] FLEXIBLE LIGHT-EMITTING-DIODES MADE FROM SOLUBLE CONDUCTING POLYMERS
    GUSTAFSSON, G
    CAO, Y
    TREACY, GM
    KLAVETTER, F
    COLANERI, N
    HEEGER, AJ
    [J]. NATURE, 1992, 357 (6378) : 477 - 479
  • [6] Lithium-aluminum contacts for organic light-emitting devices
    Haskal, EI
    Curioni, A
    Seidler, PF
    Andreoni, W
    [J]. APPLIED PHYSICS LETTERS, 1997, 71 (09) : 1151 - 1153
  • [7] Interface engineering in preparation of organic surface-emitting diodes
    Hung, LS
    Tang, CW
    [J]. APPLIED PHYSICS LETTERS, 1999, 74 (21) : 3209 - 3211
  • [8] LIU J, UNPUB
  • [9] Photovoltaic measurement of the built-in potential in organic light emitting diodes and photodiodes
    Malliaras, GG
    Salem, JR
    Brock, PJ
    Scott, JC
    [J]. JOURNAL OF APPLIED PHYSICS, 1998, 84 (03) : 1583 - 1587
  • [10] The roles of injection and mobility in organic light emitting diodes
    Malliaras, GG
    Scott, JC
    [J]. JOURNAL OF APPLIED PHYSICS, 1998, 83 (10) : 5399 - 5403