Tunable Mission and Trichromatic White‐Emitting in Oxyfluoride Glasses by Utilization of Cu + Ions as Multiple Energy‐Transfer Creators

A series of copper species, Tb 3+ , Mn 2+ single‐ and co‐doped oxyfluoride glasses were synthesized by a melt‐quenching method. The photoluminescence properties of the glasses containing copper species were demonstrated. Results indicate that the blue‐green emission band peaking at 440 nm was observed, which was ascribed to the photoluminescence of Cu + ions rather than the emissions of Cu 2+ cations or Cu nano‐particles ( Cu NP s) induced by local field effect ( LFE ) enhancement through surface plasmon resonance ( SPR ). The interaction mechanisms between Cu + and Tb 3+ / Mn 2+ have been systematically investigated, and significant enhancement of Cu + emission and the energy‐transfer ( ET ) efficiencies of Cu + → Tb 3+ and Cu + → Mn 2+ were observed in glasses doped with SnO reducing agent. Furthermore, a wide‐range‐tunable emission and ideal white‐light fluorescence were realized in Cu + / Tb 3+ / Mn 2+ ‐coactivated glasses by utilization of Cu + cations as dual ET contributors from deep‐ UV ‐source to multiactivators. Our research further extends the understanding of the interactions between Cu + and Tb 3+ / Mn 2+ in amorphous materials.