Controllable Synthesis and Luminescence Properties of Zn2GeO4 : Mn2+ Nanorod Phosphors

摘要

In this study, color tunable phosphors (Mn2+-doped Zn2GeO4) were successfully synthesized by a facile microwave hydrothermal process with H2O as solvent. Crystal field modulation and band gap doping by Mn2+ substitution for Zn2+ realizes color tunable Mn2+ emission from 424 to 535 nm. Mn2+-doping on the phase and size transition of Zn2GeO4 nanocrystals was discussed, and a possible Zn2GeO4 : xMn crystal growth mechanism is discussed. Photoluminescence (PL) spectra indicate that the d-d transition of manganese ions (T-4(1)->(6)A(1)) corresponds to a strong green emission of Zn2GeO4 : xMn phosphors.