Abstract
In recent years, rare earth ion and transition metal ion co-doped fluorescent materials have attracted a lot of attention in the fields of WLEDs and optical temperature sensing. In this study, I successfully prepared the dual-emission Mg(3)Ga(2)SnO(8):Eu(3+),Mn(4+) red phosphors and the XRD patterns and refinement results show that the prepared phosphors belong to the Fd-3m space group. The energy transfer process between Eu(3+) and Mn(4+) was systematically investigated by emission spectra and decay curves of Mg(3)Ga(2)SnO(8):0.12Eu(3+),yMn(4+) (0.002 ≤ y ≤ 0.012) phosphors and the maximum value of transfer efficiency can reach 71.2%. Due to the weak thermal quenching effect of Eu(3+), its emission provides a stable reference for the rapid thermal quenching of the Mn(4+) emission peak, thereby achieving good temperature measurement performance. The relative thermometric sensitivities of the fluorescence intensity ratio and fluorescence lifetime methods reached a maximum value of 2.53% K(-1) at 448 K and a maximum value of 3.38% K(-1) at 473 K. In addition, the prepared WLEDs utilizing Mg(3)Ga(2)SnO(8):0.12Eu(3+) phosphor have a high color rendering index of 82.5 and correlated color temperature of 6170 K. The electroluminescence spectrum of the synthesized red LED device by Mg(3)Ga(2)SnO(8):0.009Mn(4+) phosphor highly overlaps with the absorption range of the phytochrome P(FR) and thus can effectively promote plant growth. Therefore, the Mg(3)Ga(2)SnO(8):Eu(3+),Mn(4+) phosphors have good application prospects in WLEDs, temperature sensing, and plant growth illumination.