-
- Home
- Journals
- Bulletin of Materials Science
- Volume 34
- Issue 1
-
Effect of gamma radiation on electrical and optical properties of (TeO2)0.9 (In2O3)0.1 thin films
Volume 34 Issue 1 February 2011 pp 61-69
-
-
Fulltext
Click here to view fulltext PDF
Permanent link:
https://www.ias.ac.in/article/fulltext/boms/034/01/0061-0069 -
Keywords
Thin films ;tellurium dioxide ;indium oxide ;dosimeter ;sensitivity. -
Abstract
We have studied in detail the gamma radiation induced changes in the electrical properties of the (TeO2)0.9 (In2O3)0.1 thin films of different thicknesses, prepared by thermal evaporation in vacuum. The current–voltage characteristics for the as-deposited and exposed thin films were analysed to obtain current versus dose plots at different applied voltages. These plots clearly show that the current increases quite linearly with the radiation dose over a wide range and that the range of doses is higher for the thicker films. Beyond certain dose (a quantity dependent on the film thickness), however, the current has been observed to decrease. In order to understand the dose dependence of the current, we analysed the optical absorption spectra for the as-deposited and exposed thin films to obtain the dose dependences of the optical bandgap and energy width of band tails of the localized states. The increase of the current with the gamma radiation dose may be attributed partly to the healing effect and partly to the lowering of the optical bandgap. Attempts are on to understand the decrease in the current at higher doses. Employing dose dependence of the current, some real-time gamma radiation dosimeters have been prepared, which have been found to possess sensitivity in the range 5–55 𝜇Gy/𝜇A/cm2. These values are far superior to any presently available real-time gamma radiation dosimeter.
-
Author Affiliations
- Department of Physics & Meteorology, Indian Institute of Technology, Kharagpur 721 302, India
-
Dates
- Published
- February 2011
- Manuscript received
- 13 March 2010
-
-
Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
-
Bulletin of Materials Science | News
-
Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020 -
Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
-