Appearance of new photoluminescence peak and spectral evolution of Eu3+ in La2Zr2O7 nanoparticles at high pressure

Lots of efforts have been vested recently on tuning the structure and optical properties, particularly for luminescent nanophosphors. High pressure in that direction has shown great potential to tune performance However, very little attention paid properties technologically important La2Zr2O7 (LZO) pyrochlore nanoparticles (NPs) its doped counterpart La2Zr2O7:Eu3+ (LZOE) NPs under elevated pressure. Equally effort given local evolution Eu3+ ion as a function LZOE NPs. Here this work, LZO depicted strong oxygen vacancy blue emission ambient up 5.54 GPa pressure, beyond that, there is an induced green red photoluminescence (PL) band. This projected color from ? white low-intermediate-high regime. Emergence unusual visible PL band at ascribed structural phase transition ordered cotuunite which endows large disordering well induces lattice distortion ZrO6 octahedra. High-pressure excitation spectra throw interesting results wherein charge transfer retained disappears high phase. As raised, asymmetry ratio exhibits monotonic decrease ~19.77 saturation implying symmetry around ions compression. work way forward area understanding structure-property correlation, tunability modulating lanthanide dopant