CAS OpenIR  > 中科院上海应用物理研究所2011-2018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 PublicationCHEMISTRY OF MATERIALS
ISSN0897-4756
Volume28Issue:15Pages:5505-5515
Subtype期刊论文
AbstractIt 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
Indexed BySCI
Language英语
WOS IDWOS:000381320700037
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/26673
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorChen, 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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