中国物理B ›› 2011, Vol. 20 ›› Issue (8): 88502-088502.doi: 10.1088/1674-1056/20/8/088502

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Highly efficient polymer phosphorescent light-emitting devices based on a new polyfluorene derivative as host

王保争1, 刘杰1, 张斌1, 吴宏滨2, 文尚胜2, 杨伟2   

  1. (1)Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China; (2)Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China; State Key Laboratory of Physics and Chemistry of Luminescence, South China University of Technology, Guangzhou 510640, China
  • 收稿日期:2011-03-13 修回日期:2011-04-25 出版日期:2011-08-15 发布日期:2011-08-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2009CB623602) and the National Natural Science Foundation of China (Grant No. U0634003).

Highly efficient polymer phosphorescent light-emitting devices based on a new polyfluorene derivative as host

Wang Bao-Zheng(王保争)a), Liu Jie(刘杰) a), Wu Hong-Bin(吴宏滨)a)b), Zhang Bin(张斌)a), Wen Shang-Sheng(文尚胜) a)b)† , and Yang Wei(杨伟)a)b)   

  1. a Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China; b State Key Laboratory of Physics and Chemistry of Luminescence, South China University of Technology, Guangzhou 510640, China
  • Received:2011-03-13 Revised:2011-04-25 Online:2011-08-15 Published:2011-08-15
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2009CB623602) and the National Natural Science Foundation of China (Grant No. U0634003).

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摘要： Several highly efficient iridium-complex polymer light-emitting devices (PLEDs) are fabricated, with a newly synthesized blue conjugated polymer, poly[(9,9-bis(4-(2-ethylhexyloxy)phenyl)-fluorene)-co-(3,7-dibenziothiene-S,S-dioxide15)] (PPF-3,7SO15), chosen as host. High luminous efficiencies of 7.4 cd·A-1 and 27.4 cd·A-1 are achieved in red and green PLEDs, respectively, by optimizing the doping concentrations of red phosphorescent dye iridium bis(1-phenylisoquinoline) (acetylacetonate) (Ir(piq)) and green phosphorescent dye iridium tris(2-(4-tolyl)pyridinato-N, C2') (Ir(mppy)3). Furthermore, highly efficient white PLEDs (WPLEDs) with the Commission Internationale de l'Eclairage (CIE) coordinates of (0.35, 0.38) are successfully produced by carefully controlling the doping concentration of the iridium complex. The obtained WPLEDs show maximal efficiencies of 14.4 cd·A-1 and 10.1 lm·W-1, which are comparable to those of incandescent bulbs. Moreover, the electroluminescent spectrum of the white device with an initial luminance of about 1000 cd·m-2 is stable, subject to constant applied current stress, indicating that good device stability can be obtained in this system.

关键词: phosphorescent, polymer light-emitting devices, host, white

Abstract: Several highly efficient iridium-complex polymer light-emitting devices (PLEDs) are fabricated, with a newly synthesized blue conjugated polymer, poly[(9,9-bis(4-(2-ethylhexyloxy)phenyl)-fluorene)-co-(3,7-dibenziothiene-S,S-dioxide15)] (PPF-3,7SO15), chosen as host. High luminous efficiencies of 7.4 cd·A-1 and 27.4 cd·A-1 are achieved in red and green PLEDs, respectively, by optimizing the doping concentrations of red phosphorescent dye iridium bis(1-phenylisoquinoline) (acetylacetonate) (Ir(piq)) and green phosphorescent dye iridium tris(2-(4-tolyl)pyridinato-N, C2') (Ir(mppy)3). Furthermore, highly efficient white PLEDs (WPLEDs) with the Commission Internationale de l'Eclairage (CIE) coordinates of (0.35, 0.38) are successfully produced by carefully controlling the doping concentration of the iridium complex. The obtained WPLEDs show maximal efficiencies of 14.4 cd·A-1 and 10.1 lm·W-1, which are comparable to those of incandescent bulbs. Moreover, the electroluminescent spectrum of the white device with an initial luminance of about 1000 cd·m-2 is stable, subject to constant applied current stress, indicating that good device stability can be obtained in this system.

Key words: phosphorescent, polymer light-emitting devices, host, white

中图分类号:  (Optoelectronic device characterization, design, and modeling)

  • 85.60.Bt
78.55.Kz (Solid organic materials) 85.60.Jb (Light-emitting devices)