@article{01HM8RX28660YJSS6ZM09R8B3K,
  abstract     = {{Photoinduced electron transfer processes in luminescent materials drive

 numerous applications like medical imaging, ionizing radiation dosimetry

 and safety signage. However, the concentration dependency of the

 photoreduction of the dopants during this process is still poorly

 understood. Here, optical spectroscopy and electron paramagnetic

 resonance (EPR) experiments are systematically performed to reveal the

 doping concentration-dependent photoreduction behavior in Ba2-xEuxSiO4

 where a fraction of the Eu3+ dopants can be reduced to Eu2+ upon

 irradiation with X-rays. EPR measurements show that the conversion ratio

 of Eu3+& RARR;Eu2+ decreases with increasing concentration at the same

 irradiation dose, resulting in the concentration dependency of the

 photoreduction behavior in Ba2-xEuxSiO4. Optical spectroscopy

 measurements show that although the incorporated Eu3+ ions occupy at

 least three crystallographic sites, Eu3+ can only be photoreduced on one

 of these sites. Meanwhile, the relative occupancy of this photoreducible

 site decreases as the doping concentration increases. The combination of

 these two factors might be responsible for the decreased conversion

 ratio of Eu3+& RARR;Eu2+ as the doping concentration increases. These

 findings provide insights into the photoreduction of dopants in

 luminescent materials and can facilitate the exploration of this

 functional behavior for advanced devices.}},
  articleno    = {{120039}},
  author       = {{Yang, Zetian and Hu, Jieqi and Van der Heggen, David and Jiao, Mengmeng and Vrielinck, Henk and Smet, Philippe and Poelman, Dirk}},
  issn         = {{0022-2313}},
  journal      = {{JOURNAL OF LUMINESCENCE}},
  keywords     = {{Luminescent materials,Photo -induced charge transfer,Radiation,dosimetry,IONIZING-RADIATION,LUMINESCENCE,GLASS,RADIOPHOTOLUMINESCENCE,PHOTOLUMINESCENCE,EXPOSURE,EUROPIUM,PHOSPHOR,STATES}},
  language     = {{eng}},
  pages        = {{7}},
  title        = {{Less is better : insight into the concentration dependency of the photoreduction of Eu3+in Ba2SiO4}},
  url          = {{http://doi.org/10.1016/j.jlumin.2023.120039}},
  volume       = {{263}},
  year         = {{2023}},
}

Altmetric

View in Altmetric

Web of Science

Times cited: