Inhomogenous Broadening, Charge Compensation, and Luminescence Quenching in Ce3+-Doped Sr3AlO4F Phosphors
- General Electric (GE) Global Research, Niskayuna, NY (United States)
- General Electric (GE) Global Research, Bangalore (India)
- Univ. of Georgia, Athens, GA (United States). Dept. of Physics and Astronomy
- Univ. of Tartu (Estonia). Inst. of Physics
The local coordination around luminescent ions in phosphors can affect the properties of these materials. Here, we analyze the Ce3+ luminescence for the various Ce3+ centers in Sr3AlO4F-based phosphors and use the excitation, emission, and quenching of these phosphors to infer aspects of the local coordination. It is shown that Ce3+ centers with lower energy 4f1→5d1 absorption bands are likely from charge compensation effects by the replacement of F- by O2-. In addition, at higher RE3+ concentrations, additional Ce3+ centers with even lower energy 4f1→5d1 absorption bands are present, presumably due to Ce3+-RE3+ pair formation and O2- charge compensation. These Ce3+ centers with lower energy 4f1→5d1 absorption bands have their luminescence strongly quenched at room temperature. The relationships between composition and Ce3+ luminescence quenching for Sr3AlO4F-based phosphors are also discussed, giving evidence that Ce3+(5d1) ionization is the main cause for luminescence quenching in these materials.
- Research Organization:
- General Electric Co., Boston, MA (United States)
- Sponsoring Organization:
- USDOE; Tallinn Univ. of Technology (Estonia); European Union (EU)
- Grant/Contract Number:
- FC26-06NT42934; EE0003251
- OSTI ID:
- 1438467
- Journal Information:
- ECS Journal of Solid State Science and Technology, Vol. 5, Issue 1; ISSN 2162-8769
- Publisher:
- Electrochemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Local coordination, electronic structure, and thermal quenching of Ce 3+ in isostructural Sr 2 GdAlO 5 and Sr 3 AlO 4 F phosphors
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journal | August 2018 |
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