journal article·2016-08-09

Understanding the Local and Electronic Structures toward Enhanced Thermal Stable Luminescence of CaAlSiN3:Eu2+

Lei Chen, Mi Fei, Zhao Zhang, Yang Jiang, Shifu Chen, Yongqi Dong, Zhihu Sun, Zhi Zhao, Yibing Fu, Jinhua He, Can Li, Zheng Jiang

Chemistry of Materials· Volume 28· Issue 15
Publisher page

Abstract

It is a great challenge to maintain thermally stable luminescence of red phosphors in white light-emitting diodes (LEDs), because of the large Stokes shift. For the purpose of overcoming this challenge, this work elucidates the intrinsic mechanism of the thermal quenching luminescence of CaAlSiN 3:Eu 2+ . The empty 5d orbital of Eu 2+ is partly filled with electrons upon Eu 2+ increasing, as observed using XANES; and the exceptional expansion of the local Eu–N bond length, the ratio of which is far larger than the volume expansion of crystal lattice brought by doping Eu 2+, is measured using EXAFS. The shift of Fermi level predicted with the first-principles calculations is confirmed by the valence band spectra. Therefore, the changeable distribution of electrons on the excited substates and then thermal delocalization to the conduction band are the intrinsic mechanisms of thermal quenching luminescence of CaAlSiN 3:Eu 2+ . The results provide a solid basis for exploring the methods to enhance the thermal stable luminescence of CaAlSiN 3:Eu 2+ .
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Research context

OpenAlex topics: Luminescence Properties of Advanced Materials · Perovskite Materials and Applications · Inorganic Chemistry and Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China

Department of Chemistry, Anhui Science and Technology University, Fengyang 233100, China

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China

Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China

Jiangsu Bree Optronics Co., Ltd., Nanjing 211103, China

Institute of Coordination Bond Metrology and Engineering, China Jiliang University, Hangzhou 310018, China

Shanghai Synchrotron Radiation Facilities, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China

Funding

Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Chinese Academy of Sciences · Hefei City of China · Beijing National Laboratory for Molecular Science · Anhui Province of China

References (41)

Show source-provided references
1. 10.1126/science.110871210.1126/science.1108712 ↗
2. Nobel Media AB 2014. The Nobel Prize in Physics 2014. Available at:http://www.nobelprize.org/nobel_prizes/physics/laureates/2014/(accessed Februrary 6, 2016).10.1063/pt.5.2012 ↗
3. 10.3390/ma303217210.3390/ma3032172 ↗
4. 10.1038/ncomms531210.1038/ncomms5312 ↗
5. 10.1186/s40539-014-0011-810.1186/s40539-014-0011-8 ↗
6. 10.1016/j.matlet.2013.05.05710.1016/j.matlet.2013.05.057 ↗
7. 10.1016/j.materresbull.2014.08.05510.1016/j.materresbull.2014.08.055 ↗
8. 10.1021/cm100960g10.1021/cm100960g ↗
9. 10.1016/j.jlumin.2004.07.00510.1016/j.jlumin.2004.07.005 ↗
10. 10.1002/pssa.20066957610.1002/pssa.200669576 ↗
11. 10.1149/2.0061412jss10.1149/2.0061412jss ↗
12. 10.1016/S1002-0721(14)60027-210.1016/S1002-0721(14)60027-2 ↗
13. 10.1039/C5RA14320A10.1039/C5RA14320A ↗
14. 10.1039/C5TC00236B10.1039/C5TC00236B ↗
15. 10.1021/ja404510v10.1021/ja404510v ↗
16. Xie R. J. · 2011
17. 10.1021/cm803076810.1021/cm8030768 ↗
18. 10.1088/0953-8984/17/50/02710.1088/0953-8984/17/50/027 ↗
19. 10.1088/1468-6996/14/6/06420110.1088/1468-6996/14/6/064201 ↗
20. 10.1021/cm070623c10.1021/cm070623c ↗
21. 10.2109/jcersj2.117.9410.2109/jcersj2.117.94 ↗
22. 10.1154/1.366032310.1154/1.3660323 ↗
23. 10.1021/cm801669x10.1021/cm801669x ↗
24. Onuma H. · J. Ceram. Process. Res. · 2013 · 14 · s48
25. 10.1039/C5RA04350F10.1039/C5RA04350F ↗
26. 10.1039/C5CP01761K10.1039/C5CP01761K ↗
27. 10.1002/pssa.20066954710.1002/pssa.200669547 ↗
28. 10.1016/j.jallcom.2014.06.02610.1016/j.jallcom.2014.06.026 ↗
29. Larson, A. C.; Von Dreele, R. B.General Structure Analysis System (GSAS);Report LAUR 86-748;Los Alamos National Laboratory:Los Alamos, NM, 2000.
30. 10.1103/PhysRevLett.77.386510.1103/PhysRevLett.77.3865 ↗
31. 10.1103/PhysRevLett.43.149410.1103/PhysRevLett.43.1494 ↗
32. 10.1038/srep1151410.1038/srep11514 ↗
33. 1999
34. 10.1016/S0022-2313(03)00078-410.1016/S0022-2313(03)00078-4 ↗
35. 10.1088/0953-8984/15/27/31110.1088/0953-8984/15/27/311 ↗
36. 10.1021/jacs.5b0831510.1021/jacs.5b08315 ↗
37. Xie R. J. · 2011
38. 10.1088/0953-8984/19/21/21621310.1088/0953-8984/19/21/216213 ↗
39. 10.1016/S0925-8388(96)02737-510.1016/S0925-8388(96)02737-5 ↗
40. 10.1016/j.jlumin.2015.05.01710.1016/j.jlumin.2015.05.017 ↗
41. 10.1021/acs.inorgchem.5b0284510.1021/acs.inorgchem.5b02845 ↗