Energy level modeling of lanthanide defects in SrAl2O4:Eu2+
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The document discusses the energy level modeling of lanthanide defects in SrAl2O4:Eu2+, focusing on the electronic structure and luminescence properties. It includes empirical modeling approaches, spectroscopic data, and details about the electronic transitions of lanthanide ions. Additionally, it addresses the potential technological applications of these materials in high brightness phosphors.
![Empirical modeling of lanthanide materials
Ground state configuration
NN Ln Lanthanide Q = +II Q = +III
0 La Lanthanum [Xe]5d1
1 Ce Cerium [Xe]4f 2 [Xe]4f 1
2 Pr Praseodymium [Xe]4f 3 [Xe]4f 2
3 Nd Neodymium [Xe]4f 4 [Xe]4f 3
4 Pm Promethium [Xe]4f 5 [Xe]4f 4
5 Sm Samarium [Xe]4f 6 [Xe]4f 5
6 Eu Europium [Xe]4f 7 [Xe]4f 6
7 Gd Gadolinium [Xe]4f 75d1 [Xe]4f 7
8 Tb Terbium [Xe]4f 9 [Xe]4f 8
9 Dy Dysprosium [Xe]4f 10 [Xe]4f 9
10 Ho Holmium [Xe]4f 11 [Xe]4f 10
11 Er Erbium [Xe]4f 12 [Xe]4f 11
12 Tm Thulium [Xe]4f 13 [Xe]4f 12
13 Yb Ytterbium [Xe]4f 14 [Xe]4f 13
14 Lu Lutetium [Xe]4f 14
4
Jonas Joos SrAl2O4:Eu2+, electronic structure](https://image.slidesharecdn.com/15-05bps-151104130040-lva1-app6892/85/Energy-level-modeling-of-lanthanide-defects-in-SrAl2O4-Eu2-15-320.jpg)
Energy level modeling of lanthanide defects in SrAl2O4:Eu2+
- 1. jonas.joos@UGent.be Belgian Physical Society, Liège May 13, 2015 Energy level modeling of lanthanide defects in SrAl2O4:Eu2+ Jonas Joos Jonas Joos SrAl2O4:Eu2+, electronic structure
- 3. Lanthanide ions 1 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 4. Lanthanide ions 1 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 5. OFF ON Technological applications Conversion phosphor 2 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 6. OFF ON Technological applications Conversion phosphor 2 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 7. Technological applications Conversion phosphor 2 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 8. Jonas Joos Green phosphors for high brightness applications Lanthanides Electronic transitions Li6Gd(BO3)3:Tb3+ F. Zhang et al., Physics Procedia 29 (2012), 55-61 3 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 9. Lanthanides Electronic transitions Li6Gd(BO3)3:Tb3+ F. Zhang et al., Physics Procedia 29 (2012), 55-61 3 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 10. Lanthanides Electronic transitions Li6Gd(BO3)3:Tb3+ 4fN – 4fN transitions F. Zhang et al., Physics Procedia 29 (2012), 55-61 3 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 11. Lanthanides Electronic transitions Li6Gd(BO3)3:Tb3+ 4fN – 4fN transitions 4fN – 4fN-15d1 transitions F. Zhang et al., Physics Procedia 29 (2012), 55-61 3 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 12. Lanthanides Electronic transitions Li6Gd(BO3)3:Tb3+ 4fN – 4fN transitions 4fN – 4fN-15d1 transitions Charge transfer transitions F. Zhang et al., Physics Procedia 29 (2012), 55-61 3 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 13. Lanthanides Electronic transitions Li6Gd(BO3)3:Tb3+ 4fN – 4fN transitions 4fN – 4fN-15d1 transitions Charge transfer transitions host related F. Zhang et al., Physics Procedia 29 (2012), 55-61 3 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 14. 2.Energy level modeling: empirical approach
- 15. Empirical modeling of lanthanide materials Ground state configuration NN Ln Lanthanide Q = +II Q = +III 0 La Lanthanum [Xe]5d1 1 Ce Cerium [Xe]4f 2 [Xe]4f 1 2 Pr Praseodymium [Xe]4f 3 [Xe]4f 2 3 Nd Neodymium [Xe]4f 4 [Xe]4f 3 4 Pm Promethium [Xe]4f 5 [Xe]4f 4 5 Sm Samarium [Xe]4f 6 [Xe]4f 5 6 Eu Europium [Xe]4f 7 [Xe]4f 6 7 Gd Gadolinium [Xe]4f 75d1 [Xe]4f 7 8 Tb Terbium [Xe]4f 9 [Xe]4f 8 9 Dy Dysprosium [Xe]4f 10 [Xe]4f 9 10 Ho Holmium [Xe]4f 11 [Xe]4f 10 11 Er Erbium [Xe]4f 12 [Xe]4f 11 12 Tm Thulium [Xe]4f 13 [Xe]4f 12 13 Yb Ytterbium [Xe]4f 14 [Xe]4f 13 14 Lu Lutetium [Xe]4f 14 4 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 16. Empirical modeling of lanthanide materials Excited states 4 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 17. Jonas Joos Green phosphors for high brightness applications Empirical modeling of lanthanide materials Location of the lowest 5d level Spectroscopic redshift: P. Dorenbos, Journal of Solid State Sci. and Technol. 2 (2013), R3001-R3011 5 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 18. Empirical modeling of lanthanide materials Energy of charge transfer (CT) Charge transfer: Ln3+ + XQ- → Ln2+ + X(Q-1)- 6 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 19. 3.Electronic structure and persistent luminescence of SrAl2O4:LnQ+
- 20. SrAl2O4:Eu2+,Dy3+ Persistent luminescence 7 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 21. SrAl2O4:Eu2+,Dy3+ Persistent luminescence 7 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 22. SrAl2O4:Eu2+,Dy3+ Persistent luminescence 7 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 23. SrAl2O4:Eu2+,Dy3+ Persistent luminescence 7 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 24. SrAl2O4:Eu2+,Dy3+ Persistent luminescence 7 Iedereen wil naar lichtgevende Maria – p. 12 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 25. SrAl2O4:Eu2+ Photoluminescence emissionintensity(a.u.) 8 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 26. SrAl2O4:Eu2+ Photoluminescence emissionintensity(a.u.) 8 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 27. SrAl2O4:Eu2+ Photoluminescence @ 10 K 520 nm 445 nm 8 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 28. Jonas Joos Green phosphors for high brightness applications SrAl2O4:Eu2+ Energy level modeling of 4f65d1 configuration Free Eu2+ ion 4f6 5d1 (free)c central field RS so cf(ff) (f) (f) RS so cf(fd) (d) (d) 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 29. SrAl2O4:Eu2+ Energy level modeling of 4f65d1 configuration Free Eu2+ ion 4f6 5d1 c (free)c RS so cf(fd) (d) (d) RScentral f sield o cf(ff) (f) (f) 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 30. SrAl2O4:Eu2+ cfs Free Eu2+ ion 4f6 5d1 (free)c Energy level modeling of 4f65d1 configuration c RScentral f sield o cf(ff) (f) (f) RS so cf(fd) (d (d) ) 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 31. SrAl2O4:Eu2+ Free Eu2+ ion 4f6 5d1 (free)c Energy level modeling of 4f65d1 configuration c RScentral f sield cfo(ff) (f) (f) RS so cf(fd) (d (d) ) cfs 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 32. SrAl2O4:Eu2+ Free Eu2+ ion 4f6 5d1 (free)c Energy level modeling of 4f65d1 configuration c RScentral f sield cfo(ff) (f) (f) RS so cf(fd) (d (d) ) decoupled scheme: d f(f) (d) 1 1 f d f dE E E cfs 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 33. SrAl2O4:Eu2+ Free Eu2+ ion 4f6 5d1 (free)c Energy level modeling of 4f65d1 configuration c RScentral f sield cfo(ff) (f) (f) RS so cf(fd) (d (d) ) decoupled scheme: d f(f) (d) 1 1 f d f dE E E 4f6 core: similar to Eu3+: 7 F 6J 0J cfs 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 34. SrAl2O4:Eu2+ cfs Free Eu2+ ion 4f6 5d1 (free)c cfs (free) Energy level modeling of 4f65d1 configuration c RScentral f sield cfo(ff) (f) (f) RS so cf(fd) (d (d) ) decoupled scheme: d f(f) (d) 1 1 f d f dE E E 4f6 core: similar to Eu3+: 7 F 6J 0J 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 35. SrAl2O4:Eu2+ Energy (eV) Free Eu2+ ion 4f6 5d1 (free)c 5.0 4.0 3.0 cfs (free) Energy level modeling of 4f65d1 configuration c blue cfs blue central field RS so cf(ff) f (f)( ) RS so cf(fd) (d (d) ) 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 36. SrAl2O4:Eu2+ Energy (eV) Free Eu2+ ion 4f6 5d1 (blue)D (free)c 5.0 4.0 3.0 cfs (free) Energy level modeling of 4f65d1 configuration central field RS so cf(ff) f (f)( ) RS so cf(fd) (d (d) ) cfs blue c blue 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 37. SrAl2O4:Eu2+ Energy (eV) Energy (eV) cfs (green) Free Eu2+ ion 4f6 5d1 c (green) (green)D (free)c 4.0 3.0 5.0 5.0 4.0 3.0 cfs (free) cfs (free) Energy level modeling of 4f65d1 configuration cfs blue (blue)D c blue 9 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 38. SrAl2O4:Eu2+ Connection with crystallography Monoclinic unit cell (P21) Two nonequivalent Sr-sites (C1) Sr1 Sr2 10 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 39. SrAl2O4:Eu2+ Connection with crystallography Monoclinic unit cell (P21) Two nonequivalent Sr-sites (C1) Empirical relations: Prediction: Measurement 10 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 40. SrAl2O4:Eu2+ Connection with crystallography Monoclinic unit cell (P21) Two nonequivalent Sr-sites (C1) Empirical relations: EuSr1: green emission EuSr2: blue emission 10 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 41. SrAl2O4:LnQ+ Lanthanide VRBE scheme - Input VB CB Eu2+ lowest 4f Eu3+ lowest 4f Coulomb correlation energy for Eu2+/Eu3 obtained from Ce3+ spectrum: P. Dorenbos, J. Lumin 135, 93 (2013) D. Jia, J. Lumin. 117, 170 (2006) 11 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 42. SrAl2O4:LnQ+ Lanthanide VRBE scheme - Input VB CB Coulomb correlation energy for Eu2+/Eu3 obtained from Ce3+ spectrum: P. Dorenbos, J. Lumin 135, 93 (2013) D. Jia, J. Lumin. 117, 170 (2006) 11 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 43. SrAl2O4:LnQ+ Lanthanide VRBE scheme - Input VB CB Coulomb correlation energy for Eu2+/Eu3 obtained from Ce3+ spectrum Chemical shift 4f level Eu2+ obtained: P. Dorenbos, J. Lumin 135, 93 (2013) D. Jia, J. Lumin. 117, 170 (2006) 11 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 44. SrAl2O4:LnQ+ Lanthanide VRBE scheme - Input VB CB Coulomb correlation energy for Eu2+/Eu3 obtained from Ce3+ spectrum Chemical shift 4f level Eu2+ obtained: Host referred binding energy from Eu3+ CT: 11 VB vacuum EuSr1 EuSr2 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 45. SrAl2O4:LnQ+ Lanthanide VRBE scheme - Input VB CB Coulomb correlation energy for Eu2+/Eu3 obtained from Ce3+ spectrum Chemical shift 4f level Eu2+ obtained: Host referred binding energy from Eu3+ CT: 11 VB vacuum EuSr1 EuSr2 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 46. SrAl2O4:LnQ+ Lanthanide VRBE scheme 12 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 47. SrAl2O4:LnQ+ Lanthanide VRBE scheme 12 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 48. SrAl2O4:LnQ+ Lanthanide VRBE scheme 12 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 49. SrAl2O4:LnQ+ Lanthanide VRBE scheme 12 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 50. SrAl2O4:LnQ+ Lanthanide VRBE scheme 12 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 51. SrAl2O4:LnQ+ Lanthanide VRBE scheme 12 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 52. SrAl2O4:LnQ+ Lanthanide VRBE scheme 12 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 53. SrAl2O4:LnQ+ Lanthanide VRBE scheme 12 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 54. SrAl2O4:LnQ+ Lanthanide VRBE scheme Trivalent lanthanides Sr1 Sr2 13 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 55. SrAl2O4:LnQ+ Lanthanide VRBE scheme Divalent lanthanides Sr1 Sr2 13 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 56. More info 14 Jonas Joos SrAl2O4:Eu2+, electronic structure
- 57. jonas.joos@UGent.be Belgian Physical Society, Liège May 13, 2015 Energy level modeling of lanthanide defects in SrAl2O4:Eu2+ Jonas Joos Jonas Joos SrAl2O4:Eu2+, electronic structure