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Copper phthalocyanine and metal free phthalocyanine bulk heterojunction for temperature sensing

A. FAROOQ1,2,* , Kh. S. KARIMOV2, KH. S. KARIMOV3, F. WAHAB4, T. ALI2, S. ZAMEER ABBAS2

Affiliation

  1. Wah Engineering College, University of Wah, Wah Cantt. 47040, Pakistan
  2. GIK Institute of Engineering Sciences and Technology, Topi 23640, Swabi, Pakistan
  3. Physical Technical Institute, Aini St. 299/1, Dushanbe 734063, Tajikistan
  4. Department of Physics, Abdul Wali Khan University, Mardan 23200, Pakistan

Abstract

This study presents the fabrication and temperature sensing properties of the sensors based on copper phthalocyanine (CuPc) and metal free phthalocyanine (H2Pc) bulk heterojunction. To fabricate the sensors on conductive glass, indium tin oxide (ITO) layer was deposited on glass substrate and the bulk heterojunction thin films of CuPc and α-Pc with 100-200 nm thickness were deposited by thermal evaporation. As a top electrode Al thin film was deposited by thermal evaporation as well. The resistance of the sensors decreases with temperature in the interval from 30 ℃ to 90 ℃. Resistance temperature coefficients (S) at 30 ℃ was in the range from (-4 %/℃) to (-6 %/℃) depending on the technological parameters of the samples. Simulation was carried out and results were in good agreement with experimental data. The obtained results show that the investigated heterojunction’s temperature sensitivity is in the range of sensitivity of best semiconductor temperature sensors..

Keywords

Bulk heterojunction, Copper phthalocyanine, Metal free phthalocyanine, Temperature sensor, Thin films, Simulation.

Submitted at: June 6, 2013
Accepted at: May 7, 2015

Citation

A. FAROOQ, Kh. S. KARIMOV, KH. S. KARIMOV, F. WAHAB, T. ALI, S. ZAMEER ABBAS, Copper phthalocyanine and metal free phthalocyanine bulk heterojunction for temperature sensing, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 5-6, pp. 822-826 (2015)