Structural, photoluminescence and radioluminescence properties of Eu3+ doped La2Hf2O7 nanoparticles

Incident X-ray and UV photons interact with La2Hf2O7: xmol%Eu3+(x=1-35) nanoparticles (NPs) to yield strong red luminescence centered at 612 nm. Colored spheres inside NP diagram represent pyrochlore coordination environment of La2Hf2O7:xmol%Eu3+. Blue, red, yellow, green and black spheres represent hafnium(IV) atoms, lanthanum(III)/europium(III) atoms, oxygen atoms at 48f site, oxygen atoms at 8b site and oxygen vacancies, respectively.226