Organic Light-Emitting Diodes based on m-MTDATA as Hole Injection Layer

  • Kim, Jeong-Moon (School of Chemical Engineering & Technlolgy, Yeungnam University) ;
  • Hwang, Hyun-Min (School of Chemical Engineering & Technlolgy, Yeungnam University) ;
  • Park, Chin-Ho (School of Chemical Engineering & Technlolgy, Yeungnam University)
  • Published : 2003.07.09

Abstract

Three-color organic light-emitting diodes (OLEDs) of metal-semiconductor-metal (MSM) structure have been favricated by using m-MTDATA [4,4',4"-tris (3-methylphenylphenylamino) triphenylamine] as hole injection layer(HIL). The mMTDATA is shown to be an effective hole injecting material, in that the insertion of mMTDATA greatly reduces the roughness of anode surface and improves the device performance. Red, green and blue OLEDs were fabricated, and their color coordinates in CIE chromaticity were found to be (0.600, 0.389), (0.240, 0.525), and (0.171, 0.171), respectively. The luminous efficiencies of the fabricated OLEDs were 1.4 lm/W at 106 $cd/m^{2}$ for red, 1.4 lm/W at 100 $cd/m^{2}$ for green, and 2.0 lm/W at 104 $cd/m^{2}$ for blue.

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