Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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$NO_2$ Gas Detection Characteristics of Langmuir-Blodgett Films layered with Dilithium phthalocyanine($Li_2Pc$)

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  • Cho, H.K. (Dept. of Electrical and Control Eng., Hong-Ik Univ.) ;
  • Yoo, B.H. (Dept. of Electrical and Control Eng., Hong-Ik Univ.) ;
  • Kim, H.S. (Dept. of Electrical and Control Eng., Hong-Ik Univ.) ;
  • Kim, T.W. (Dept. of Physics, Hong-Ik Univ.) ;
  • Kim, J.S. (Dept. of Electrical and Control Eng., Hong-Ik Univ.)
  • Published : 1994.07.21
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Abstract

An ability of $NO_2$ gas detection has been investigated using dilithium phthalocyanine($Li_2Pc$) Langmuir-Blodgett (LB) films. It is a well-known gas sensitive material and has been manufactured under a surface pressure of 30mN/m. A status of deposited films was confirmed by UV-visible absorption spectrum, ellipsometry measurements and current-voltage characteristics. Gas-detection characteristics of the films were studied through an electrical conductivity, response time, recovery time, and reproducibility under 200 ppm of $NO_2$ gases.

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