Abstract
Generally, the reduction of Eu3+ to Eu2+ in solids requires annealing in a reducing atmosphere. In this work, we find that the reduction of Eu3+ to Eu2+ can be realized in Yb2Si2O7 phosphors after being soaked in boiling water. Eu3+-activated Yb2Si2O7 with different doping concentrations was synthesized by a sol-gel method. The as-prepared Yb2Si2O7:Eu3+ phosphors showed strong red emission at 612 nm under ultraviolet light, corresponding to the 5D0 → 7F2 transition of Eu3+. The optimized doping concentration of Eu3+ was 7 mol% with the highest emission intensity at 612 nm. The valence change and luminescence properties of Eu-doped Yb2Si2O7 phosphors after being soaked in boiling water are reported and the reduction mechanism from Eu3+ to Eu2+ in the compounds is discussed. Our findings suggest that this kind of Eu3+ → Eu2+ valence transfer might shed light on the development of phosphors for display applications.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
