English  |  正體中文  |  简体中文  |  Post-Print筆數 : 11 |  Items with full text/Total items : 88866/118573 (75%)
Visitors : 23553171      Online Users : 554
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU 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
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/75556


    Title: All-in-one light-tunable borated phosphors with chemical and luminescence dynamical control resolution
    Authors: Lin, C.C.;Liu, Y.-P.;Xiao, Zhi Ren
    蕭智仁
    Contributors: 應物所
    Keywords: Electron energy levels;Emission spectroscopy;Energy transfer;Light emitting diodes;Light sources;Manganese;Phosphors;Photoluminescence;devices;DFT investigations;Energy transfer effects;Experimental determination;Fluorescence lifetime measurements;Generalized gradient approximations;Photoluminescence spectrum;Ultraviolet light-emitting diodes;Light emission
    Date: 2014-06
    Issue Date: 2015-06-04 11:25:30 (UTC+8)
    Abstract: Single-composition white-emitting phosphors with superior intrinsic properties upon excitation by ultraviolet light-emitting diodes are important constituents of next-generation light sources. Borate-based phosphors, such as NaSrBO3:Ce3+ and NaCaBO3:Ce3+, have stronger absorptions in the near-ultraviolet region as well as better chemical/physical stability than oxides. Energy transfer effects from sensitizer to activator caused by rare-earth ions are mainly found in the obtained photoluminescence spectra and lifetime. The interactive mechanisms of multiple dopants are ambiguous in most cases. We adjust the doping concentration in NaSrBO3:RE (RE = Ce3+, Tb3+, Mn2+) to study the energy transfer effects of Ce3+ to Tb3+ and Mn2+ by comparing the experimental data and theoretical calculation. The vacuum-ultraviolet experimental determination of the electronic energy levels for Ce3+ and Tb3+ in the borate host regarding the 4f-5d and 4f-4f configurations are described. Evaluation of the Ce 3+/Mn2+ intensity ratios as a function of Mn2+ concentration is based on the analysis of the luminescence dynamical process and fluorescence lifetime measurements. The results closely agree with those directly obtained from the emission spectra. Density functional calculations are performed using the generalized gradient approximation plus an on-site Coulombic interaction correction scheme to investigate the forbidden mechanism of interatomic energy transfer between the NaSrBO3:Ce3+ and NaSrBO3:Eu2+ systems. Results indicate that the NaSrBO3:Ce3+, Tb3+, and Mn2+ phosphors can be used as a novel white-emitting component of UV radiation-excited devices. © 2014 American Chemical Society.
    Relation: ACS Applied Materials and Interfaces, 6(12), 9160-9172
    Data Type: article
    DOI 連結: http://dx.doi.org/10.1021/am501232y
    DOI: 10.1021/am501232y
    Appears in Collections:[應用物理研究所 ] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML1297View/Open


    All items in 政大典藏 are protected by copyright, with all rights reserved.


    社群 sharing

    著作權政策宣告
    1.本網站之數位內容為國立政治大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,惟仍請適度,合理使用本網站之內容,以尊重著作權人之權益。商業上之利用,則請先取得著作權人之授權。
    2.本網站之製作,已盡力防止侵害著作權人之權益,如仍發現本網站之數位內容有侵害著作權人權益情事者,請權利人通知本網站維護人員(nccur@nccu.edu.tw),維護人員將立即採取移除該數位著作等補救措施。
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback