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High-efficiency and high-stability phosphorescent OLED based on new Ir complex

Wang Jun Wei Xiao-Qiang Rao Hai-Bo Cheng Jian-Bo Jiang Ya-Dong

High-efficiency and high-stability phosphorescent OLED based on new Ir complex

Wang Jun, Wei Xiao-Qiang, Rao Hai-Bo, Cheng Jian-Bo, Jiang Ya-Dong
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  • Abstract views:  4473
  • PDF Downloads:  1859
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Publishing process
  • Received Date:  26 May 2006
  • Accepted Date:  04 July 2006
  • Published Online:  05 January 2007

High-efficiency and high-stability phosphorescent OLED based on new Ir complex

  • 1. 电子科技大学光电信息学院,电子薄膜与集成器件国家重点实验室,成都 610054

Abstract: Multi-layer phosphorescent OLED with (tpbi)2Ir(acac) was fabricated which has the structure: ITO/CuPc (40 nm)/α-NPD (45 nm)/CBP: (tpbi)2Ir(acac) (3%, 30 nm)/BCP (20 nm)/Alq3 (20 nm)/LiF (1 nm)/Al (100 nm). Absorption spectra, phosphorescence lifetime of Ir complex, and I-V-L characteristic of the device was tested. The current of the device under low applied voltage conforms to the Richaardon-Schotty emission, and shows linear relationship under high voltage. Gauss peak fit shows the OLED spectra to be composed of α-NPD peak(450 nm), (tpbi)2Ir(acac) main peak(518 nm) and shoulder peak(543 nm). Maximum power efficiency of PHOLED is 12.1 lm/W (at 6V) with luminance 136 cd/m2, and the maximum luminance is 13500 cd/m2 with power efficiency 0.584 lm/W.

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