Red-emissive Mn-doped Li₂Ge₄O₉ phase synthesized via glass-ceramic route

抄録

We synthesized the lithium-tetragermanate (Li₂Ge₄O₉) phase doped with Mn⁴⁺ by glass-ceramics technique using the stoichiometric glass-precursor with different MnO₂ concentrations, i.e., 20Li₂O–80GeO₂–xMnO₂ (x = 0.1–0.7), and examined their photoluminescent property. The doped phase showed clear red-emission at room temperature, and the internal quantum-yield was found to be approximately 40% in the samples with x = 0.1–0.3.