Lead-Free Cesium Manganese Halide Nanocrystals Embedded Glasses for X-Ray Imaging

The toxicity of heavy-metal Pb and instability of lead-based halide perovskite nanomaterials are main factors to impede their practical applications in the fields of solar cells, LEDs and scintillators. In this paper, all inorganic lead-free cesium manganese halide nanocrystals are synthesized in glass for the first time. Red photoluminescence with broad PL band, negligible self-absorption and a high photoluminescence quantum yield of 41.8% is obtained. In addition, modulating halide component can change the Mn2+ ions coordination environment to obtain tunable photoluminescence from red to green. More importantly, cesium manganese halide nanocrystals embedded glasses exhibit outstanding long-term stabilities. Theses cesium manganese halide nanocrystals embedded glasses are also highly stable against high energy irradiation and exhibit highly efficient radioluminescence, making them promising for high-resolution X-ray imaging. These results demonstrate that cesium manganese halide nanocrystals embedded glasses are promising eco-friendly candidates for applications in light-emitting diodes and scintillators.

Automated summary

In this study, inorganic lead-free cesium manganese halide nanocrystals embedded glasses were synthesized for the first time. These glasses exhibited red photoluminescence with broad PL band, tunable photoluminescence from red to green, and outstanding long-term stabilities. Moreover, they also showed highly efficient radioluminescence and stability against high energy irradiation, making them promising for applications in light-emitting diodes and scintillators.