Luminescence properties, energy transfer, and potential applications of Sr2MgAl22O36:Mn2+,Cr3+ phosphor

Multiple-emission phosphors, which can be engineered via co-doping strategies and energy transfer regulation, have become a research hotspot in recent years. In this research, Mn 2+ and Cr 3+ doped Sr 2 MgAl 22 O 36 phosphors were prepared using a high-temperature solid-state reaction method. The green light emission of Mn 2+ and the deep-red emission of Cr 3+ were investigated, and the impacts of doping concentration and temperature were discussed in detail. Dual-band emission can be achieved for co-doped samples under blue light excitation, and the energy transfer from Mn 2+ to Cr 3+ was confirmed. Owing to the distinct temperature responses of Mn 2+ and Cr 3+ , optical temperature sensing properties were demonstrated for the co-doped sample, which may offer a feasible approach for non-contact temperature measurement. Moreover, a triple-emission phosphor-converted light-emitting diode (pc-LED) device was fabricated, highlighting the potential application of Sr 2 MgAl 22 O 36 :Mn 2+ ,Cr 3+ in plant growth.