Energy Transfer and Green/Red Phosphorescence in γ-Zn₃(PO₄)₂:Mn²⁺, Ga³⁺

Abstract:

In this letter, γ-Zn₃(PO₄)₂: Mn²⁺ phosphors have only one emission band centered at 620 nm while two emission bands are observed in γ-Zn₃(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 influence of Ga3+ ions on luminescence and long lasting phosphorescence properties of Mn²⁺ in phosphor γ-Zn₃(PO₄)₂: Mn²⁺, Ga³⁺ are also investigated. It is found that the green/red phosphorescence performance of Mn²⁺ ion such as brightness and duration is largely improved when Ga³⁺ ion is co-doped into the matrix in which Mn²⁺ ion acts as luminescent center and Ga³⁺ ion plays an important role of electron trap.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 2396-2400
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.2396
• Online since: June 2012
• Authors: Rui Xia Zhong, Zi Ran Liu, Xiao Peng Meng, Ming Ya Li, Xiao Yan Zhang
• Keywords: Energy Transfer, Long Lasting Phosphorescence, Mn²⁺, Optical Property

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