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

Sensors

A. Arshak¹  S. Zleetni¹ 

[1] id="af1-sensors-02-00174">Department Electronics and Computer Engineering, University of Limerick, Plassey Technological Park, Limerick, Co. Limerick, Ireland. Tel: [phone]. Fax: [phone]

关键词: Optical band gap;    γ-rays;    Dosimetry;    Manganese phthalocyanine;    MnPc;   

DOI  :  10.3390/s20500174

来源: mdpi

【 摘 要 】

Manganese phthaloyanine polymer thick films were fabricated using screen-printing 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.

【 授权许可】

Unknown   
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