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
发表期刊CHEMISTRY OF MATERIALS
ISSN0897-4756
卷号28期号:15页码:5505-5515
文章类型期刊论文
摘要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+.
DOI10.1021/acs.chemmater.6b02121
收录类别SCI
语种英语
WOS记录号WOS:000381320700037
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/26673
专题中科院上海应用物理研究所2011-2018年
通讯作者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.
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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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