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Sensing of chemical vapors by copper phthalocyanine (CuPc) thin films

SUKHWINDER SINGH1, G. S. S. SAINI1, S. K. TRIPATHI1,*

Affiliation

  1. Department of Physics, Centre of Advanced Study in Physics, Panjab University, Chandiharh-160014, India

Abstract

Thin films of copper phthalocyanine have been deposited onto glass substrates by thermal evaporation technique at room temperature. The electrical measurements (dc conductivity and photoconductivity) have been taken at different temperatures in the range 300-400 K. These films have been studied as chemical sensors such as methanol and ammonia. Electrical measurements indicate that these thin films have moderate sensitivity towards methanol and ammonia vapors. Infrared absorption spectra indicate that central metal ion interacts with the vapors. Coordination of vapors at fifth coordination site is responsible for the sensing properties of CuPc..

Keywords

Sensor, Copper Phthalocyanine thin films, Chemical vapors sensing, Photoconductivity.

Submitted at: May 22, 2007
Accepted at: Jan. 18, 2008

Citation

SUKHWINDER SINGH, G. S. S. SAINI, S. K. TRIPATHI, Sensing of chemical vapors by copper phthalocyanine (CuPc) thin films, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 1, pp. 185-189 (2008)