γ-radiation sensor using optical and electrical properties of manganese phthalocyanine (MnPc) thick film

被引：41

作者：

Arshak, A ^{[1
]}

Zleetni, S ^{[1
]}

Arshak, K ^{[1
]}

机构：

[1] Univ Limerick, Dept Elect & Comp Engn, Limerick, Ireland

来源：

SENSORS | 2002年 / 2卷 / 05期

关键词：

optical band gap; gamma-rays; dosimetry; manganese phthalocyanine; MnPc;

D O I：

10.3390/s20500174

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

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 gamma-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 gamma-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 gamma-ray exposure.

引用

页码：174 / 184

页数：11

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