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Sensors 2002, 2(5), 174-184; doi:10.3390/s20500174
Article

γ-radiation Sensor Using Optical and Electrical Properties of Manganese Phthalocyanine (MnPc) Thick Film

,  and *
Department Electronics and Computer Engineering, University of Limerick, Plassey Technological Park, Limerick, Co. Limerick, Ireland
* Author to whom correspondence should be addressed.
Received: 16 April 2002 / Accepted: 10 May 2002 / Published: 12 May 2002
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Abstract

Manganese phthaloyanine polymer thick films were fabricated using screenprinting techniques. The optical parameters were obtained from the analysis of the absorption spectra over a wavelength range of 385-900nm. The d.c. electrical measurements were carried out in a range of 0-30 volts. The effects of γ-radiation on the optical and the electrical properties were investigated for dosimetry applications. The optical energy band gaps of these films showed a decrease in their values with the increase in the radiation dose. The electronic transition has changed from direct allowed for the as-printed films (unexposed to γ-rays) to indirect allowed for the irradiated samples. Both the as-printed and irradiated Ag/MnPc/Ag devices demonstrated a Schottky conduction mechanism. Both the absorbance and the capacitance of the MnPc thick films displayed a highly consistent linear response to γ-ray exposure.
Keywords: Optical band gap; γ-rays; Dosimetry; Manganese phthalocyanine; MnPc Optical band gap; γ-rays; Dosimetry; Manganese phthalocyanine; MnPc
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Arshak, A.; Zleetni, S.; Arshak, K. γ-radiation Sensor Using Optical and Electrical Properties of Manganese Phthalocyanine (MnPc) Thick Film. Sensors 2002, 2, 174-184.

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