Preparation and near-infrared luminescence properties of Y₂MgTiO₆: Mn⁴⁺/ Nd³⁺

A series of Y₂MgTiO₆:Mn^4+/Nd³⁺ down-conversion materials were prepared by traditional high-temperature solid-phase reaction. The steady-state excitation emission spectra and transient fluorescence lifetime were analyzed. During the energy transfer process of Mn⁴⁺→Nd³⁺, the infrared emission of 885 nm and 1 085 nm generated by Nd³⁺ under the excitation of 331 nm corresponds to 4F_3/2→4I_11/2 and 4F_3/2→4I_9/2 energy level transition. The results confirmed that the luminescence intensity of Y₂MgTiO₆ doped with Mn⁴⁺ and Nd³⁺ at 1 085 nm was 5 times stronger than that of Y₂MgTiO₆ doped with Nd³⁺. Furthermore, the energy transfer from Mn⁴⁺ to Nd³⁺ is mainly achieved by the electric dipole-dipole mechanism of resonance energy transfer. The near-infrared emitting down-conversion material Y₂MgTiO₆: Mn⁴⁺/Nd³⁺ is very useful for the luminescence conversion layer of crystalline silicon solar cells.