Nonequivalent lanthanide defects: energy level modeling
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The document discusses the energy level modeling of nonequivalent lanthanide defects, highlighting how different lanthanide ions exhibit varying behaviors in spectroscopic applications. It emphasizes the need for complex models to understand distinct experimental features and the impact of local environments on energy levels. Several examples and empirical schemes are presented, illustrating the challenges and insights related to lanthanide defects in materials.
Nonequivalent lanthanide defects: energy level modeling
- 1. LumiLab Department of Solid State Sciences Ghent University Belgium iCom, Budva, Montenegro September 4, 2015 Jonas J. Joos, Dirk Poelman, Philippe F. Smet Jonas Joos Nonequivalent lanthanide defects: energy level modeling Nonequivalent lanthanide defects: energy level modeling
- 2. Energy levels, a tool for spectroscopy 1 Jonas Joos Nonequivalent lanthanide defects: energy level modeling 4f2 4f5d CT host* many-body diagram Pr3+
- 3. Energy levels, a tool for spectroscopy 1 Jonas Joos Nonequivalent lanthanide defects: energy level modeling 4f2 4f5d CT host* many-body diagram Pr3+
- 4. Energy levels, a tool for spectroscopy 1 Jonas Joos Nonequivalent lanthanide defects: energy level modeling 4f2 4f5d CT host* many-body diagram one-electron diagram Pr3+
- 5. Energy levels, a tool for spectroscopy 1 Jonas Joos Nonequivalent lanthanide defects: energy level modeling 4f2 4f5d CT host* many-body diagram one-electron diagram charge-state transition level Pr3+
- 6. Empirical energy level schemes 2 CaGa2S4 Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 7. Empirical energy level schemes 2 CaGa2S4 Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 8. Empirical energy level schemes 2 CaGa2S4 Jonas Joos Nonequivalent lanthanide defects: energy level modeling easy!
- 9. Multiple defects 3 Jonas Joos Nonequivalent lanthanide defects: energy level modeling Easy: All lanthanide ions do the same example: CaGa2S4 Harder: All lanthanides do the same example: SrAl2O4 Hard: Some lanthanides act “special” example: SrGa2S4 Sr1 Sr2 Eu2+ Ce3+
- 10. Multiple defects 3 Jonas Joos Nonequivalent lanthanide defects: energy level modeling Easy: All lanthanide ions do the same example: CaGa2S4 Harder: All lanthanides do the same example: SrAl2O4 Hard: Some lanthanides act “special” example: SrGa2S4 Sr1 Sr2 Eu2+ Ce3+
- 11. Site-selective PL spectroscopy 4 Eu2+ J. Botterman, J. J. Joos, P. F. Smet, Phys. Rev. B 90, 085147 (2014) Sr1 Sr2 Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 12. Site-selective PL spectroscopy 4 Eu2+ Ce3+ D. D. Jia, J. Lumin. 117, 170 (2006) Sr1 Sr2 Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 13. Site-selective PL spectroscopy 4 J. Botterman, J. J. Joos, P. F. Smet, Phys. Rev. B 90, 085147 (2014) VB Eu2+ Ce3+ Eu3+ Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 14. Site-selective PL spectroscopy 4 J. Botterman, J. J. Joos, P. F. Smet, Phys. Rev. B 90, 085147 (2014) VB vacuum EuSr1 EuSr2 Eu2+ Ce3+ Eu3+ Sr1 Sr2 Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 15. Two-site energy level scheme 5 Trivalent lanthanides Sr1 Sr2 J. Botterman, J. J. Joos, P. F. Smet, Phys. Rev. B 90, 085147 (2014) Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 16. Two-site energy level scheme 6 Divalent lanthanides Sr1 Sr2 Sr1 Sr2 J. Botterman, J. J. Joos, P. F. Smet, Phys. Rev. B 90, 085147 (2014) Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 17. Two-site energy level scheme 7 Divalent lanthanides J. Botterman, J. J. Joos, P. F. Smet, Phys. Rev. B 90, 085147 (2014) Jonas Joos Nonequivalent lanthanide defects: energy level modeling Sr1 Sr2
- 18. Two-site energy level scheme 7 Divalent lanthanides J. Botterman, J. J. Joos, P. F. Smet, Phys. Rev. B 90, 085147 (2014) Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 19. Multiple defects 3 Jonas Joos Nonequivalent lanthanide defects: energy level modeling Easy: All lanthanide ions do the same example: CaGa2S4 Harder: All lanthanides do the same example: SrAl2O4 Hard: Some lanthanides act “special” example: SrGa2S4 Sr1 Sr2 Eu2+ Ce3+
- 20. Multiple defects 3 Jonas Joos Nonequivalent lanthanide defects: energy level modeling Easy: All lanthanide ions do the same example: CaGa2S4 Harder: All lanthanides do the same example: SrAl2O4 Hard: Some lanthanides act “special” example: SrGa2S4 Sr1 Sr2 Eu2+ Ce3+
- 21. PL spectroscopy Eu2+ and Ce3+ 8 Jonas Joos Nonequivalent lanthanide defects: energy level modeling energy (eV)
- 22. PL spectroscopy Eu2+ and Ce3+ 8 Jonas Joos Nonequivalent lanthanide defects: energy level modeling energy (eV)
- 23. PL spectroscopy Eu2+ and Ce3+ Jonas Joos Nonequivalent lanthanide defects: energy level modeling 8 energy (eV)
- 24. PL spectroscopy Eu2+ and Ce3+ Jonas Joos Nonequivalent lanthanide defects: energy level modeling 8 energy (eV)
- 25. PL spectroscopy Eu2+ and Ce3+ Jonas Joos Nonequivalent lanthanide defects: energy level modeling 8 energy (eV)
- 26. PL spectroscopy Eu2+ and Ce3+ Jonas Joos Nonequivalent lanthanide defects: energy level modeling 8 energy (eV)
- 27. PL spectroscopy Eu2+ and Ce3+ Jonas Joos Nonequivalent lanthanide defects: energy level modeling 8 energy (eV)
- 28. Local environment from EPR 9 SrGa2S4:Eu2+ SrGa2S4:Ce3+ W. L. Warren et al., Appl. Phys. Lett. 70, 478 (1997) Jonas Joos Nonequivalent lanthanide defects: energy level modeling SrGa2S4:Ce3+
- 29. Repercussions on E-level scheme 10 Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 30. Repercussions on E-level scheme 10 Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 31. Multiple defects 3 Jonas Joos Nonequivalent lanthanide defects: energy level modeling Easy: All lanthanide ions do the same example: CaGa2S4 Harder: All lanthanides do the same example: SrAl2O4 Hard: Some lanthanides act “special” example: SrGa2S4 Sr1 Sr2 Eu2+ Ce3+
- 32. Conclusions 11 Realistic materials often require more complex models Very distinct experimental features burried in uncertainty intervals General physical insight most important merit Jonas Joos Nonequivalent lanthanide defects: energy level modeling
- 33. LumiLab Department of Solid State Sciences Ghent University Belgium iCom, Budva, Montenegro September 4, 2015 Jonas J. Joos, Dirk Poelman, Philippe F. Smet Jonas Joos Nonequivalent lanthanide defects: energy level modeling Nonequivalent lanthanide defects: energy level modeling