A study of the impact of oxygen vacancies on the VUV efficiency of rare-earth doped YBO3 via Ca2+ co-doping

Authors

Michaella Swinhart, Central Washington University
Asher DeLarme, Central Washington University
Anthony L. Diaz, Central Washington UniversityFollow

Document Type

Article

Department or Administrative Unit

Chemistry

Publication Date

5-2022

Abstract

Vacuum ultraviolet excitation and reflectance spectroscopy were used to study doped yttrium borate phosphors with composition Y_1-x-yBO₃:RE_y, Ca_x up to x = 0.10 and up to y = 0.06 (Eu³⁺ or Tb³⁺). These data were used to estimate host-to-activator energy transfer efficiencies. The introduction of Ca²⁺ leads to the formation of oxygen vacancies, V_O^●●, that act as energy traps. We find that the introduction of these defects lowers the transfer efficiency to both dopants, with Eu³⁺ being impacted more than Tb³⁺. The results are discussed in terms of the energies of dopant states relative to band states, and the difference in trapping mechanisms between the two rare earth ions.

Comments

This article was originally published in Optical Materials. The full-text article from the publisher can be found here.

Due to copyright restrictions, this article is not available for free download from ScholarWorks @ CWU.

Recommended Citation

Swinhart, M., DeLarme, A., & Diaz, A. L. (2022). A study of the impact of oxygen vacancies on the VUV efficiency of rare-earth doped YBO3 via Ca2+ co-doping. Optical Materials, 127, 112261. https://doi.org/10.1016/j.optmat.2022.112261

Journal

Optical Materials

Rights

© 2022 Elsevier B.V.