AI Article Synopsis
- This study explores the white-light emission properties of a newly discovered compound, CaYSiON, activated by cerium (Ce), using optical measurements and density functional theory (DFT) calculations.
- The compound emits a range of colors from purple to white when exposed to ultraviolet (UV) light due to the unique distribution of calcium (Ca) and yttrium (Y) in its structure.
- This research marks the first instance of a phosphor emitting white light with just Ce activation, highlighting the significance of local structural variations caused by the disorder in the material.
Article Abstract
White-light emission with a single activator is an attractive function of phosphors. In this work, we investigated the photoluminescence properties of CaYSiON, which is a compound denoted as CaYSiON discovered by our group, with Ce-activation using optical measurements and density functional theory (DFT) calculation. Samples showed a tunable emission from purple to white under ultraviolet (UV) light. In this compound, Ca and Y as well as anions are distributed disorderly, and Ca/Y ions occupy two crystallographically distinct sites; those sites are possible sites for Ce substitution. DFT calculation and structural refinement revealed that the tunable emission was generated by Ce at the crystallographically equivalent site but with distinct local structures caused by the disordering of cations and anions. As far as we know, this is the first report about a white-light-emitting phosphor with only Ce activation.
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| http://dx.doi.org/10.1021/acs.inorgchem.3c03789 | DOI Listing |
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