Red/blue-shift dual-directional regulation of α′L-(Ca, Sr)2SiO4:Eu2+ phosphors resulting from the incorporation content of Eu2+/Sr2+ ions

In this work, tunable emission from green to red and the inverse tuning from red to green in alpha'(L)-(Ca, Sr)(2)SiO4:Eu2+ phosphors were demonstrated magically by varying the incorporation content of Eu2+ and Sr2+ ions, respectively. The tunable emission properties and the tuning mechanism of red-shift resulting from the Eu2+ content as well as that of blue-shift induced by the Sr2+ content were investigated in detail. As a result of fine-controlling the incorporation content of Eu2+, the emission peak red-shifts from 541 nm to 640 nm. On the other hand, the emission peak inversely blue-shifts from 640 nm to 546 nm through fine-adjusting the incorporation content of Sr2+. The excellent tuning characteristics for alpha'(L)-(Ca, Sr)(2)SiO4:Eu2+ phosphors presented in this work exhibited their various application prospects in solid-state lighting combining with a blue chip or a near-UV chip.