{"title":"Influence of Mg doping on structure and optical properties of red-emitting phosphor Li2TiO3:Mn4+","authors":"","doi":"10.1016/j.jssc.2024.124965","DOIUrl":null,"url":null,"abstract":"<div><p>Li<sub>2</sub>TiO<sub>3</sub>:Mn<sup>4+</sup> has been previously identified as a potential candidate to replace commercial red-emitting Eu<sup>2+</sup>-activated phosphors. Its luminescent efficiency is limited by the presence of defects and the sensitivity of Mn<sup>4+</sup> to redox processes. A series of co-doped Li<sub>2</sub>TiO<sub>3</sub>: <em>x</em> Mg<sup>2+</sup>, 0.01 Mn<sup>4+</sup> samples were prepared to gain insight on the effect of electron doping on the structure and photoluminescent properties, through characterization by powder X-ray diffraction, elemental analysis, and optical spectroscopy. As Mg<sup>2+</sup> substitutes for Li<sup>+</sup>, the ordered arrangement of cations within the honeycomb layers in the parent structure (Li<sub>2</sub>SnO<sub>3</sub>-type, an ordered derivative of rocksalt) gradually transforms to a more disordered arrangement. The increased cation site disorder leads to less intense and broader emission peaks as well as lower quantum yields.</p></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":null,"pages":null},"PeriodicalIF":3.2000,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Solid State Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022459624004195","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Li2TiO3:Mn4+ has been previously identified as a potential candidate to replace commercial red-emitting Eu2+-activated phosphors. Its luminescent efficiency is limited by the presence of defects and the sensitivity of Mn4+ to redox processes. A series of co-doped Li2TiO3: x Mg2+, 0.01 Mn4+ samples were prepared to gain insight on the effect of electron doping on the structure and photoluminescent properties, through characterization by powder X-ray diffraction, elemental analysis, and optical spectroscopy. As Mg2+ substitutes for Li+, the ordered arrangement of cations within the honeycomb layers in the parent structure (Li2SnO3-type, an ordered derivative of rocksalt) gradually transforms to a more disordered arrangement. The increased cation site disorder leads to less intense and broader emission peaks as well as lower quantum yields.
期刊介绍:
Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.