Valence transfer of Eu3+ activated in Yb2Si2O7 phosphors: Luminescence and self reduction
Source abstract
Abstract
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.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Radiation Detection and Scintillator Technologies · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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