Transactions on Electrical and Electronic Materials

  • 제18권2호
  • /
  • Pages.89-92
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  • 2017
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  • 1229-7607(pISSN)
  • /
  • 2092-7592(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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Performance of Three-Layered Organic Light-Emitting Diodes Using the Hole-Transport and Injection Layer of TPD and Teflon-AF, and the Electron-Injection Layer of Li2CO3 and LiF

  • Shin, Jong Yeol (Department of Computer.Mechatronics Engeering, Sahmyook University) ;
  • Kim, Tae Wan (Department of Physics, Hongik University) ;
  • Kim, Gwi Yeol (Department of Electrical Engineering, Kwangwoon University) ;
  • Lee, Su Min (Department of Electrical Engineering, Kwangwoon University) ;
  • Hong, Jin Woong (Department of Electrical Engineering, Kwangwoon University)
  • 투고 : 2016.12.12
  • 심사 : 2017.01.23
  • 발행 : 2017.04.25
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초록

The performance of three-layered organic light-emitting diodes (OLEDs) was investigated using TPD hole-transport and injection layers, Teflon-AF, and the electron-injection layer of $Li_2CO_3$ and LiF. The OLEDs were manufactured in a structure of TPD/$Alq_3$/LiF, TPD/$Alq_3$/$Li_2CO_3$, and AF/$Alq_3$/LiF using low-molecular organic materials. In three different three-layered OLEDs, it was found that the device with the TPD/$Alq_3$/LiF structure shows higher performance in maximum luminance, and maximum external quantum efficiency compared to those of the device with TPD/$Alq_3$/$Li_2CO_3$ and TPD/$Alq_3$/LiF by 35% and 17%, and 193% and 133%, respectively. It is thought that the combined LiF/Al cathode contributes to a reduced work function and improves an electrical conduction mechanism due to the electron injection rather than the hole transport, which then increases a recombination rate of charge carriers.

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피인용 문헌

  1. Exploring the experimental photoluminescence, Raman and infrared responses and density functional theory results for TFB polymer vol.236, 2018, https://doi.org/10.1016/j.synthmet.2017.12.008