Structural and luminescent properties of red-emitting Eu3+-doped ternary rare earth antimonates R3SbO7 (R = La, Gd, Y)

Eu³⁺-doped antimonates show distinct luminescence spectra. ⁵D₀ → ⁷F₄, ⁵D₀ → ⁷F₁ and ⁵D₀ → ⁷F₀ are the dominant transitions for Eu³⁺-doped La₃SbO₇, Gd₃SbO₇ and Y₃SbO₇ respectively, due to different microstructures around the Eu³⁺ ions in the lattices.