Ultra-stable and color-tunable manganese ions doped lead-free cesium zinc halides nanocrystals in glasses for light-emitting applications

All inorganic CsPbX_(3)(X=Cl,Br,and I)perovskite nanocrystals have made unprecedented radical progresses for opto-electronic applications,but their instability and toxicity of lead impede their wide applications.Herein,we report the first precipitation of leadfree Mn:Cs_(2)ZnX_(4) nanocrystals in glasses.Efficient green and red photoluminescence are realized from these Mn:Cs_(2)ZnX_(4 )nanocrystals in glasses.By adjusting the size and halide component in these nanocrystals,coordination environment of Mn^(2+)ions can be tuned,leading to tunable photoluminescence with improved quantum efficiency.It is illustrated that in-situ precipitation of these Mn:Cs_(2)ZnX_(4) nanocrystals in glasses significantly improves their thermal-,chemical-,and photo-stabilities,making them promising for light-emitting diodes with stable chromaticity coordinates.