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THE SENSING OF HUMIDITY BY SURFACE-TYPEAg/FORMYL-TIPPCu(II)/AgSENSOR FOR ENVIRONMENTAL MONITORING

Author

Listed:
  • DIL NAWAZ KHAN

    (Faculty of Engineering Sciences, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi, 23640 KPK, Pakistan;
    Department of Physics, Government Postgraduate College Abbottabad, KPK, Pakistan)

  • MUHAMMAD HASSAN SAYYAD

    (Faculty of Engineering Sciences, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi, 23640 KPK, Pakistan)

  • MUHAMMAD TAHIR

    (Faculty of Engineering Sciences, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi, 23640 KPK, Pakistan;
    Department of Physics, Abdul Wali Khan University Mardan, 23200 KPK, Pakistan)

  • FAZAL WAHAB

    (Faculty of Engineering Sciences, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi, 23640 KPK, Pakistan)

  • MUHAMMAD YASEEN

    (Punjab Forensic Science Agency, Lahore, Pakistan)

  • MUKHTAR ALI

    (Government College of Science, Lahore, Pakistan)

  • MUNAWAR ALI MUNAWAR

    (Institute of Chemistry, University of Punjab, Lahore, Pakistan)

Abstract

In this paper, we have studied the effects of changing relative humidity on the electrical parameters and their multi frequency response of the surface typeAg/formyl-TIPPCu(II)/Aghumidity sensors. The silver electrodes of thickness 100 nm were primarily deposited on cleaned glass substrates by thermal evaporator. A gap of 40 μm was created between the electrodes of each device by using mask during the evaporation process. Thin films of formyl-TIPPCu(II)of 140 nm thickness were grown on silver electrodes by thermal sublimation technique. The values of capacitance and resistance of the sensors were found at different humidity levels at frequency of 1, 10 and 100 kHz of AC input signal. A remarkable increase in capacitance and decrease in resistance were observed during the rise of relative humidity from 45% to 95% RH. The hysteresis response of these humidity sensors was also studied at 1 kHz AC signal.

Suggested Citation

  • Dil Nawaz Khan & Muhammad Hassan Sayyad & Muhammad Tahir & Fazal Wahab & Muhammad Yaseen & Mukhtar Ali & Munawar Ali Munawar, 2014. "THE SENSING OF HUMIDITY BY SURFACE-TYPEAg/FORMYL-TIPPCu(II)/AgSENSOR FOR ENVIRONMENTAL MONITORING," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 21(04), pages 1-7.
    • Handle: RePEc:wsi:srlxxx:v:21:y:2014:i:04:n:s0218625x14500486
    DOI: 10.1142/S0218625X14500486
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    Keywords

    Humidity sensor; organic semiconductors;

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