Optical radiation sensing properties of MnO/TeO2 thin films

被引：20

作者：

Arshak, Khalil I. ^{[1
]}

Korostynska, Olga ^{[1
]}

Molloy, Jonathan ^{[1
]}

Harris, John ^{[1
]}

机构：

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

来源：

IEEE SENSORS JOURNAL | 2006年 / 6卷 / 03期

关键词：

gamma radiation sensor; MnO/TeO2; mixtures; optical properties; thin films;

D O I：

10.1109/JSEN.2006.874016

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This work investigates the effects of gamma-rays on the optical properties of pure and mixed-oxide materials, namely MnO and TeO2, for their possible application as thin film optical gamma radiation sensors. The values of the optical band gap E-opt were obtained in view of the Mott and Davis theory. All samples showed a decrease in E-opt with an increase in radiation dose to a certain level, which was found to be composition dependent. Films with 100 wt. % MnO exhibited the highest sensitivity to low doses of radiation, showing a strong decline in the optical band gap value from 0.64 eV before irradiation to 0.54 eV after a dose of 1.14 mGy. It was experimentally confirmed that both the sensitivity and the working dose range of radiation sensors can be controlled by the composition of the materials used.

引用

页码：656 / 660

页数：5

共 22 条

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