Unveiling the role of the hexagonal polymorph on SrAl₂O₄-based phosphors.

ABSTRACT: In persistent luminescence materials, the SrO-Al₂O₃ system has been mainly studied due to its chemical stability, higher photoluminescence response and longest green-afterglow times. Specifically, the research has focused on SrAl₂O₄ doped with europium and dysprosium. SrAl₂O₄ has two polymorphs: monoclinic polymorph (space group P2₁) and hexagonal polymorph (space group P6₃22). Besides, the coexistence of these two phases, monoclinic and hexagonal, appears in almost all the results. However, it is not clear how this coexistence influences optical response. Some authors have reported that only the monoclinic structure exhibits luminescence properties, while another suggests that the hexagon

SUBMITTER: Rojas-Hernandez RE 

PROVIDER: S-EPMC9084411 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature