Improved Performance of Polymer Light-Emitting Diodes with an Electron Transport Emitter by Post-Annealing

被引：1
作者：
Xiong Yan [1 ,2 ]
Peng Jun-Biao [1 ]
Wu Hong-Bin [1 ]
Wang Jian [1 ]
机构：
[1] S China Univ Technol, Key Lab Special Funct Mat, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
[2] Yangtze Univ, Sch Phys Sci & Technol, Jinzhou 434023, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2009年 / 26卷 / 09期
基金：
中国国家自然科学基金; 湖北省教育厅重点项目;
关键词：
HIGH-EFFICIENCY; POLYFLUORENE; COPOLYMER; EMISSION; DEVICES; TEMPERATURE; BLEND;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The enhancement of electroluminescent (EL) performance of polymer light emitting diodes (PLEDs) with electron transport emitter poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) through thermal annealing treatment is investigated. Post-annealing of the PLEDs at temperature 120 degrees C over the glass transition temperature of F8BT (99 degrees C) could bring about an improvement of EL efficiency to more than twice that of the untreated devices, up to 6.02 cd/A. The improvement of the EL efficiency is due to the balance of electron and hole carriers in the exciton recombination zone, because the dominative electron current in the PLEDs could be reduced by post-annealing in terms of both issues of electron transport limited in the F8BT film and electron injection decreased by the interface between F8BT/cathode.
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页数：4
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共 26 条
  • [11] Achieving high-efficiency polymer white-light-emitting devices
    Huang, JS
    Li, G
    Wu, E
    Xu, QF
    Yang, Y
    [J]. ADVANCED MATERIALS, 2006, 18 (01) : 114 - 117
  • [12] Efficient top-emitting polymer light-emitting diodes using chromium as anode
    Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China
    不详
    [J]. Chin. Phys. Lett., 2007, 7 (2097-2100): : 2097 - 2100
  • [13] Effect of thermal annealing on the lifetime of polymer light-emitting diodes
    Kim, J
    Lee, J
    Han, CW
    Lee, NY
    Chung, IJ
    [J]. APPLIED PHYSICS LETTERS, 2003, 82 (24) : 4238 - 4240
  • [14] Effect of electron-transport polymer addition to polymer/fullerene blend solar cells
    Kim, Y
    Cook, S
    Choulis, SA
    Nelson, J
    Durrant, JR
    Bradley, DDC
    [J]. SYNTHETIC METALS, 2005, 152 (1-3) : 105 - 108
  • [15] Bright red emission from single layer polymer light-emitting devices based on blends of regioregular P3HT and F8BT
    Kim, Y
    Bradley, DDC
    [J]. CURRENT APPLIED PHYSICS, 2005, 5 (03) : 222 - 226
  • [16] Lee TW, 2000, ADV MATER, V12, P801, DOI 10.1002/(SICI)1521-4095(200006)12:11<801::AID-ADMA801>3.0.CO
  • [17] 2-G
  • [18] Multilayer green polymer light emitting diodes with improved efficiency and lifetime
    Li, J.
    Sano, T.
    Hirayama, Y.
    Tomita, T.
    Fujii, H.
    Wakisaka, K.
    [J]. JOURNAL OF APPLIED PHYSICS, 2006, 100 (03)
  • [19] Effects of thermal annealing on light-emitting devices based on fluorene-copolymers with thiophene and ethylenedioxythienylene
    Niu, YH
    Hou, Q
    Yuan, M
    Cao, Y
    [J]. SYNTHETIC METALS, 2003, 135 (1-3) : 477 - 478
  • [20] Thermal annealing below the glass transition temperature: A general way to increase performance of light-emitting diodes based on copolyfluorenes
    Niu, YH
    Hou, Q
    Cao, Y
    [J]. APPLIED PHYSICS LETTERS, 2002, 81 (04) : 634 - 636
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