4.6 Article

Green/red photoluminescence emission in γ-Zn3(PO4)2:Mn2+/Ga3+ for applications in ultraviolet-light emitting diodes

Journal

CHEMICAL PHYSICS LETTERS
Volume 536, Issue -, Pages 55-60

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2012.03.076

Keywords

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Funding

  1. Fundamental Research Funds for the Central Universities [N110423001, N110823001]
  2. Hebei province Nature Science Foundation of China [A2010001379]

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In this Letter, gamma-Zn-3(PO4)(2):Mn2+ phosphors have only one emission band centered at 620 nm while two emission bands are observed in gamma-Zn-3(PO4)(2):Mn2+, Ga3+, which are respectively centered at 507 nm and 620 nm. The spectral overlap between the green emission band and the excitation band monitored at 620 nm, which supports the occurrence of the energy transfer from Mn2+ (CN = 4) to Mn2+ (CN = 6), has been studied. The distribution of Mn2+ ions in tetrahedral and octahedral lattice changes with the incorporation of Ga3+ ions. The ratio of the green to the red enhances because of the increase of both Ga3+ and Mn2+ concentration. (C) 2012 Elsevier B. V. All rights reserved.

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