Thermoluminescence of Y2O3:Tb3+ thin films deposited by electron beam evaporation

Philip R. Armstrong, Merlin L. Mah, Sangho S. Kim, Joseph J. Talghader

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Most thermoluminescent materials are created using crystal growth techniques; however, it would be of great utility to identify those few thermoluminescent materials that can be deposited using simpler methods, for example to be compatible with the early portions of a silicon integrated circuit or microelectromechanical fabrication process. In this work, thin films of yttrium oxide with a terbium impurity (Y2O3:Tb) were deposited on silicon wafers by electron beam evaporation. The source for the Y2O3:Tb was made by combining Y2O3 and Tb4O7 powders. The approximate thicknesses of the deposited films were 350 nm. After deposition, the films were annealed at 1100 C for 30 s to improve crystallinity. There is a strong correlation between the x-ray diffraction (XRD) peak intensity and the thermoluminescent glow curve intensity. The glow curve displays at least two peaks at 140 C and 230 C. The emission spectra was measured using successive runs with a monochromator set to a different wavelength for each run. There are two main emission peaks at 490 nm and 540 nm. The terbium impurity concentration of approximately 1 mol% was measured using Rutherford backscattering spectrometry (RBS). The Y 2O3:Tb is sensitive to UV, x-ray, and gamma radiation. The luminescent intensity per unit mass of UV irradiated Y2O 3:Tb was about 2 times that of x-ray irradiated TLD-100.

Original languageEnglish (US)
Pages (from-to)225-229
Number of pages5
JournalJournal of Luminescence
Volume148
DOIs
StatePublished - Apr 1 2014

Keywords

  • Lanthanide
  • Microfabrication
  • Rare earth
  • Thermoluminescence
  • Thin film
  • Yttria

Fingerprint Dive into the research topics of 'Thermoluminescence of Y<sub>2</sub>O<sub>3</sub>:Tb<sup>3+</sup> thin films deposited by electron beam evaporation'. Together they form a unique fingerprint.

Cite this