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

doi:10.1021/acs.chemmater.6b02121

CAS OpenIR > 中科院上海应用物理研究所2011-2020年

	Understanding the Local and Electronic Structures toward Enhanced Thermal Stable Luminescence of CaAlSiN3:Eu2+
	Chen, L; Fei, M; Zhang, Z; Jiang, Y; Chen, SF; Dong, YQ; Sun, ZH; Zhao, Z; Fu, YB; He, JH; Li, C; Jiang, Z; Chen, L (reprint author), Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China.; Chen, SF (reprint author), Anhui Sci & Technol Univ, Dept Chem, Fengyang 233100, Peoples R China.
	2016
Source Publication	CHEMISTRY OF MATERIALS
ISSN	0897-4756
Volume	28 Issue:15 Pages:5505-5515
Subtype	期刊论文
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 CaAlSiN3:Eu2+. The empty 5d orbital of Eu2+ is partly filled with electrons upon Eu2+ 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 Eu2+, 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 CaAlSiN3:Eu2+. The results provide a solid basis for exploring the methods to enhance the thermal stable luminescence of CaAlSiN3:Eu2+.
DOI	10.1021/acs.chemmater.6b02121
Indexed By	SCI
Language	英语
WOS ID	WOS:000381320700037
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/26673
Collection	中科院上海应用物理研究所2011-2020年
Corresponding Author	Chen, L (reprint author), Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China.; Chen, SF (reprint author), Anhui Sci & Technol Univ, Dept Chem, Fengyang 233100, Peoples R China.
Recommended Citation GB/T 7714	Chen, L,Fei, M,Zhang, Z,et al. Understanding the Local and Electronic Structures toward Enhanced Thermal Stable Luminescence of CaAlSiN3:Eu2+[J]. CHEMISTRY OF MATERIALS,2016,28(15):5505-5515.
APA	Chen, L.,Fei, M.,Zhang, Z.,Jiang, Y.,Chen, SF.,...&Chen, SF .(2016).Understanding the Local and Electronic Structures toward Enhanced Thermal Stable Luminescence of CaAlSiN3:Eu2+.CHEMISTRY OF MATERIALS,28(15),5505-5515.
MLA	Chen, L,et al."Understanding the Local and Electronic Structures toward Enhanced Thermal Stable Luminescence of CaAlSiN3:Eu2+".CHEMISTRY OF MATERIALS 28.15(2016):5505-5515.

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