Volltext-Downloads (blau) und Frontdoor-Views (grau)

Light emission intensities of luminescent Y2O3:Eu and Gd2O3:Eu particles of various sizes

  • There is great technological interest in elucidating the effect of particle size on the luminescence efficiency of doped rare earth oxides. This study demonstrates unambiguously that there is a size effect and that it is not dependent on the calcination temperature. The Y2O3:Eu and Gd2O3:Eu particles used in this study were synthesized using wet chemistry to produce particles ranging in size between 7 nm and 326 nm and a commercially available phosphor. These particles were characterized using three excitation methods: UV light at 250 nm wavelength, electron beam at 10 kV, and X-rays generated at 100 kV. Regardless of the excitation source, it was found that with increasing particle diameter there is an increase in emitted light. Furthermore, dense particles emit more light than porous particles. These results can be explained by considering the larger surface area to volume ratio of the smallest particles and increased internal surface area of the pores found in the large particles. For the small particles, the additional surface area hosts adsorbates that lead to non-radiative recombination, and in the porous particles, the pore walls can quench fluorescence. This trend is valid across calcination temperatures and is evident when comparing particles from the same calcination temperature.

Download full text files

Export metadata

Additional Services

Share in Twitter Search Google Scholar


Document Type:Article
Author:Jens Adam, Wilhelm Metzger, Marcus Koch, Peter Rogin, Toon Coenen, Jennifer S. Atchison, Peter König
Parent Title (English):Nanomaterials
Year of first Publication:2017
Release Date:2022/11/18
Tag:Gd2O3:EU; Y2O3:EU; cathodoluminescence (CL); fluorescence; luminescence; particle size effect; scintillation
Impact:03.504 (2017)
Funding Information:Federal Ministry of Education and Research within the funding program Photonics Research Germany (Contract number 13N12378)
Physikalische Analytik
Optische Materialien
Open Access:Open Access
Signature:INM 2017/018
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International