title: Fluorescence spectra and crystal field analysis of BaMoO(4): Eu(3+) phosphors for white light-emitting diodes.
abstract: The red phosphors play a vital role in controlling luminous efficiency, color rendering index and adjustability in color temperature of white light emitting diodes (w-LEDs). Here, we demonstrate a type of red-emitting phosphors Eu(3+)-doped barium molybdate phosphors effectively excited by the blue light (464nm). These phosphors present the strong emission spectra around 613nm and their color coordinate values are close to the NTSC standard values. More importantly, by constructing a complete 3003×3003 energy matrix by an effective operator Hamiltonian including the free ion and crystal field interactions, for the first time, the fluorescent mechanism for Eu(3+) ions at the tetragonal (S4) Ba(2+) site of BaMoO(4) crystal were investigated by a complete diagonalization (of energy matrix) method (CMD). The fitting values are close to the experimental results, demonstrating the feasibility of using the complete diagonalization method to study the phosphors for w-LEDs.
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science & Technology of China, Chengdu 610054, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science & Technology of China, Chengdu 610054, China; Department of Optics and Electronics, Chengdu University of Information and Technology, Chengdu 610225, China. Electronic address: cdywq12@163.com.
authors.forename: Weiqing
authors.initials: W
authors.lastname: Yang
authors.affiliation: Department of Material Science, Sichuan University, Chengdu 610064, China.
authors.forename: Honggang
authors.initials: H
authors.lastname: Liu
authors.affiliation: Department of Optics and Electronics, Chengdu University of Information and Technology, Chengdu 610225, China.
authors.forename: Li
authors.initials: L
authors.lastname: Huang
authors.affiliation: Department of Optics and Electronics, Chengdu University of Information and Technology, Chengdu 610225, China.
authors.forename: Bowen
authors.initials: B
authors.lastname: Zhao
authors.affiliation: Department of Optics and Electronics, Chengdu University of Information and Technology, Chengdu 610225, China.
authors.forename: Ce
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Optics and Electronics, Chengdu University of Information and Technology, Chengdu 610225, China.
authors.forename: Guoliang
authors.initials: G
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science & Technology of China, Chengdu 610054, China. Electronic address: linyuan@uestc.edu.cn.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Lin
mesh_terms: D001464:Barium / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D008958:Models, Molecular; D008982:Molybdenum / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D049408:Luminescent Agents; D001464:Barium; D005063:Europium; D008982:Molybdenum
keywords: BaMoO(4): Eu(3+); Complete diagonalization method; Fluorescent spectra; White LEDs