Synthesis of Zn(II) 5,10,15,20-tetrakis(4′-isopropylphenyl) porphyrin and its use as a thin film sensor

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2010, Vol.98 (1), p.103-109
• Main Authors: Sayyad, Muhammad H., Saleem, Muhammad, Karimov, Khasan S., Yaseen, Muhammad, Ali, Mukhtar, Cheong, Kuan Y., Mohd Noor, Ahmad F.
• Format: Article
• Language: English
• Subjects: Channels; Characterization and Evaluation of Materials; Condensed Matter Physics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electrical properties of specific thin films; Electrodes; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Exact sciences and technology; Machines; Manufacturing; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Polymers; organic compounds; Porphyrins; Processes; Relative humidity; Sensors; Silver; Surface chemistry; Surfaces and Interfaces; Synthesis; Thin Films
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-009-5441-6

In this paper, we have reported the synthesis and use of an organic semiconductor Zn(II) 5,10,15,20-tetrakis(4′-isopropylphenyl) porphyrin (ZnTIPP) as an active material in a surface type sensor. Ag/ZnTIPP/Ag sensor was fabricated by thermal sublimation of ZnTIPP on a glass substrate with preliminary deposited surface type silver electrodes. Semiconducting channel between silver electrodes was 0.04 mm × 15 mm. Changes in electrical measurements of the device were observed with increase of relative humidity, illumination, and temperature. A small degree of hysteresis and acceptable response and recovery times were observed over a wide range of relative humidity. Activation energy of the ZnTIPP was estimated.