Nonequivalent lanthanide defects: energy level modeling
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The 4th International Conference on the Physics of Optical Materials and Devices (iCom) 31st August to 4th September 2015, Budva, Montenegro
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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