淡江大學機構典藏:Item 987654321/96885
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 64178/96951 (66%)
Visitors : 10944876      Online Users : 21329
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
    •  Adv. Search
    Home ‧ Login ‧ Upload ‧ Help ‧ About ‧ Administer Goto mobile version


    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/96885


    Title: Contribution of cations to the photoluminescence properties of Eu-doped barium oxonitridosilicates phosphors
    Authors: Tang, Jia-Ye;Gao, Jing-Kun;Chen, Jun-Hua;Hao, Lu-Yuan;Xu, Xin;Lee, Ming-Hsien
    Contributors: 淡江大學物理學系
    Date: 2013-11
    Issue Date: 2014-03-14 05:11:20 (UTC+8)
    Publisher: Amsterdam: Elsevier Science
    Abstract: The photoluminescence properties are sensitive to the cations of the host lattice in many phosphors. We selected a typical oxonitridosilicate phosphor (Eu2+-doped Ba3Si6O12N2 green phosphor) to investigate this interesting phenomenon by using Cambridge Sequential Total Energy Package (CASTEP) based on density functional theory (DFT) under generalized gradient approximation (GGA). The effects of partial substitution of Ca atoms for Ba atoms in the Eu2+-doped Ba3Si6O12N2 phosphors were studied. Full geometry relaxation results indicated that both Ca and Eu atoms preferentially occupy the Ba1 sites in the Ba3Si6O12N2 crystal. According to the calculated total and atom resolved partial density of states, the densities of the upper and lower states related to the luminescence properties are mainly offered by Ba and Eu atoms, respectively. The 5d states of Ba atoms provide extra density of states to the upper states, resulting in enhanced luminescence intensity. The substituent Ca atoms dilute the upper states, leading to the degeneration of the luminescence intensity. The calculation results could also be used to explain that Ba atoms are superior than other alkaline atoms in many oxonitridosilicate phosphors.
    Relation: Computational Materials Science 79(6), pp.478-484
    DOI: 10.1016/j.commatsci.2013.06.011
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

    Files in This Item:

    File Description SizeFormat
    Contribution of cations to the photoluminescence properties of Eu-doped barium oxonitridosilicates phosphors.pdf2199KbAdobe PDF1View/Open
    index.html0KbHTML322View/Open
    index.html0KbHTML112View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback