Preferential occupancy of Eu³⁺ and energy transfer in Eu³⁺ doped Sr₂V₂O₇, Sr₉Gd(VO₄)₇ and Sr₂V₂O₇/Sr₉Gd(VO₄)₇ phosphors.

ABSTRACT: The vanadate-based phosphors Sr₂V₂O₇:Eu³⁺ (SV:Eu³⁺), Sr₉Gd(VO₄)₇:Eu³⁺ (SGV:Eu³⁺) and Sr₉Gd(VO₄)₇/Sr₂V₂O₇:Eu³⁺ (SGV/SV:Eu³⁺) were obtained by solid-state reaction. The bond-energy method was used to investigate the site occupancy preference of Eu³⁺ based on the bond valence model. By comparing the change of bond energy when the Eu³⁺ ions are incorporated into the different Sr, V or Gd sites, we observed that Eu³⁺ doped in SV, SGV or SV/SGV would preferentially occupy the smaller energy variation sites, i.e., Sr4, Gd and Gd sites, respectively. The crystal s

SUBMITTER: Li L 

PROVIDER: S-EPMC9077092 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature