The Study on the Defect States and Persistent Luminescent Mechanism of MgSiO₃: Mn²⁺, Dy³⁺ Phosphor

Abstract:

In order to clarify the role of Dy³⁺ on persistent luminescence properties of MgSiO₃:Mn²⁺, Dy³⁺ and explain the persistent luminescent mechanism, the positron annihilation technique was used to study the defect states of MgSiO₃:Mn²⁺, Dy³⁺. It was revealed that the structure of deeper traps were not normally respected Mg²⁺ vacancies and oxygen vacancies but the associated defect V"Mg-2Dy•Mg which emerged by Dy³⁺ doping in MgSiO₃:Mn²⁺. This associated defect V"Mg-2Dy•Mg resulted in the excellent persistent luminescence in MgSiO₃:Mn²⁺, Dy³⁺ phosphor and a possible persistent luminescent mechanism for MgSiO₃:Mn²⁺, Dy³⁺ was given.

• Periodical: Advanced Materials Research (Volumes 391-392)
• Pages: 1041-1046
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.391-392.1041
• Online since: December 2011
• Authors: Zhi Long Wang, Hui Chen, Ya Li Zhao, Bin Ya Yang, Fei Zhou
• Keywords: MgSiO₃:Dy³⁺, MgSiO₃:Mn²⁺, Persistent Luminescence, Positron Annihilation

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