Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Electrical Properties of Molecular Diode Using Eicosanoic Acid Langmuir-Blodgett(LB) Monolayer Film

Eicosanoic Acid Langmuir-Blodgett(LB) 박막을 이용한 분자 다이오드의 전기적 특성

  • Koo, Ja-Ryong (Department of Electrical Information and Control Engineering, Hongik University) ;
  • Lee, Ho-Sik (Center for Organic Materials & Information Devices(COMID), Hongik University) ;
  • Kwon, Hyuck-Joo (Department of Chemical Engineering, Hongik University) ;
  • Sohn, Byoung-Chung (Department of Chemical Engineering, Hongik University)
  • 구자룡 (홍익대학교 전기정보제어공학과) ;
  • 이호식 (홍익대학교 유기 소재 및 정보 소자 연구센터) ;
  • 권혁주 (홍익대학교 화학공학과) ;
  • 손병청 (홍익대학교 화학공학과)
  • Published : 2003.06.30
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Abstract

Electron transfer through an Langmuir-Blodgett(LB) monolayer film sandwiched between metal electrodes. We used an eicosanoic acid material and the material was very famous as a thin film insulating material. Eicosanoic acid monolayer was deposited by Langmuir-Blodgett(LB) technique and a subphase was a $CdCl_2$ solution as a 2${\times}10^{-4}$ mol/L. Also we used a bottom electrode as an Al/$Al_2O_3$ and a top electrode as a Al and Ti/Al. Here, the $Al_2O_3$ on the bottom electrode was deposited by thermal evaporation method. The $Al_2O_3$ layer was acted on a tunneling barrier and insulating layer in tunnel diode. It was found that the proper transfer surface pressure for film deposition was 25 mN/m and the limiting area per molecule was about 24 ${\AA}^2$/molecule. When the positive and negative bias applied to the molecular device, the behavior shows that a tunnel switching characteristics. This result were analyzed regarding various mechanisms.

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References

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