Composition modification for tuning the luminescent property in Sr19(Mg, Mn)2(PO4)14: Eu2+ phosphors

作者：Zhou, Weiying; Fan, Jiaqi; Zhang, Xinguo^*

来源：Journal of Luminescence, 2021, 239: 118369.

DOI：10.1016/j.jlumin.2021.118369

• Whitlockite
• Site preference
• Energy transfer
• Phosphor

Different crystallographic sites occupation has significant influence on the luminescent characteristics of the Eu2+ and Mn2+ activated phosphors. In this study, in order to have an in-depth research on basic photoluminescence mechanism, a compositional modification for luminescent tuning and enhancement in whitlockite-structural phosphor Sr-19(Mg1-xMnx)(2)(PO4)(14): Eu2+ is applied. The result shows that both Eu2+/Mn2+ site-occupancy and Eu2+-Mn2+ energy transfer could be tuned by changing Eu2+/Mn2+ content in Sr-19(Mg1-xMnx)(2)(PO4)(14). Owing to this, the emission variation from Eu2+ orange through Mn2+ red to double blue-red bands is simultaneously observed upon ultraviolet light excitation. Meanwhile, the optical spectroscopy property, decay and thermal quenching behavior as well as related mechanism of optimal Sr-19(Mg1-xMnx)(2)(PO4)(14): Eu2+ are studied in detail.

• 单位
  南方医科大学