In
this work, GdOF:RE3+ (RE = Eu, Yb, and Er) phosphors
with high thermally stable luminescence were reported, which were
synthesized by an ionic liquid-assisted two-phase system and subsequent
calcination technique for the first time. Nanodisks, nanorod aggregates,
nanoneedles, and stubby nanorods were obtained by simply regulating
the pH value. The luminescent properties of precursors and products
were discussed in detail. By carefully adjusting the calcination temperature
and the pH value of the initial system, pure red emission was achieved
in both GdOF:Eu3+ and GdOF:Yb3+, Er3+ phosphors. The reason for distinct luminescent properties of different
products was discussed from various perspectives. Moreover, the temperature-dependent
spectra were measured and the GdOF:Eu3+ and GdOF:Yb3+, Er3+ products both exhibited outstanding thermal
stability. In addition, the as-prepared nanomaterials presented paramagnetic
properties, indicating their potential application in both field-emission
displays and magnetic resonance imaging technology.