Cooperative Quantum Cutting of Nano-Crystalline BaF₂:Tb³⁺, Yb³⁺ in Oxyfluoride Glass Ceramics

We report on cooperative quantum cutting in Tb³⁺-Yb³⁺ codoped glass ceramics. Precipitation of BaF₂ nano-crystals is confirmed by XRD and HRTEM analysis. Near-infrared emission due to transition of Yb³⁺ ions under 485nm excitation indicates cooperative energy transfer from Tb³⁺ to Yb³⁺. The
quantum efficiency of this process reaches 145%. The realization of quantum cutting in glass ceramics may have promising applications in solar cells.