Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

A study on the molecular orientation effect of septithiophene

Septithiophene의 배향 특성에 관한 연구

  • Park, J.H. (Dept. of Electrical and Control Eng. Hongik Univ.) ;
  • Moon, J.H. (Dept. of Electrical and Control Eng. Hongik Univ.) ;
  • Lee, Y.S. (Dept. of Electrical and Control Eng. Hongik Univ.) ;
  • Choi, J.S. (Dept. of Electrical and Control Eng. Hongik Univ.) ;
  • Shin, D.M. (Dept. of Chemical Eng. Hongik Univ.) ;
  • Cho, W.R. (School of Electrical Eng. Seoul National Univ.) ;
  • Lee, S.D. (School of Electrical Eng. Seoul National Univ.)
  • 박재훈 (홍익대학교 전기제어공학과) ;
  • 문지혜 (홍익대학교 화학공학과) ;
  • 이용수 (홍익대학교 전기제어공학과) ;
  • 최종선 (홍익대학교 전기제어공학과) ;
  • 신동명 (홍익대학교 화학공학과) ;
  • 조욱래 (서울대학교 전기공학부) ;
  • 이신두 (서울대학교 전기공학부)
  • Published : 2000.07.17
Download PDF
⟨ Previous Next ⟩

Abstract

We have investigated a molecular orientation effect of septithiophene(7T), the conjugated linear septenary of thiophene, on its optical and electrical properties. Vacuum evaporation of septithiophene on a substrate induces a upright orientation. We rubbed the pre-layer to lie down molecules. As a result, we could get a horizontal molecular orientation. Dichroic ratio is about 2 at 418nm from UV/visible absorption spectrum. To investigate the electrical characteristics, we fabricated devices with septithiophene as a semiconducting material. The conductivity with horizontal septithiophene orientation is about one order gloater than that of upright septithiophene.

Keywords