Mn4+ doped Mg2ScSbO6 deep-red-emitting double-perovskite phosphors for plant-cultivation

Non-rare earth Mn4+-doped oxide matrix phosphors are of increasing interest in the field of light-emitting diodes due to their good spectral properties. Herein, Mn4+-doped Mg2ScSbO6 phosphor was successfully synthesized via the conventional solid-state reaction method. The crystal structure of the sample was determined using a variety of characterization methods such as X-ray powder diffraction and Rietveld refinement analysis. The phosphor has a broadband absorption from near ultraviolet to blue light and emits deep red (similar to 682 nm) light of (2)Eg -> (4)A(2g) transition. The photoluminescence intensity and decay lifetime of the Mn4+-doped Mg2ScSbO6 are observed to be strongly dependent on temperature, and the results of quenching analysis were reported. The optimal Mg2ScSbO6:Mn4+ phosphor has a high color purity of 99.4% with an internal quantum efficiency value of 61.93% modulated by charge compensation of Li+ ions. The photoluminescence peak position of the phosphor can be well matched with the absorption peak of red and far-red phytochrome. Therefore, the deep-red-emitting phosphors have tremendous application merits and potential markets in plant growth.

Automated summary

Non-rare earth Mn4+-doped oxide matrix phosphors have attracted increasing interest in the field of light-emitting diodes due to their excellent spectral properties. In this study, Mn4+-doped Mg2ScSbO6 phosphor was successfully synthesized and its crystal structure was determined using X-ray powder diffraction and Rietveld refinement analysis. The phosphor exhibited broadband absorption from near ultraviolet to blue light and deep red emission at approximately 682 nm. The photoluminescence intensity and decay lifetime of the phosphor were found to be strongly dependent on temperature, and the results of quenching analysis were reported. The optimized Mg2ScSbO6:Mn4+ phosphor exhibited high color purity of 99.4% and an internal quantum efficiency value of 61.93% modulated by charge compensation of Li+ ions. The photoluminescence peak position of the phosphor was well matched with the absorption peak of red and far-red phytochrome. Therefore, deep-red-emitting phosphors have great application potential in plant growth.