Growth and Luminescence Properties of Cs3Cu2I5 Single Crystal
In recent years,luminescent materials have been widely used in fields such as lighting,display and medical imaging.Copper(I)based halides have received widespread attention due to their excellent luminescent properties and stability.This article reports a method for growing Cs3Cu2I5 single crystals,using organic solvent(DMF)and solvent evaporation method to grow 3 ×2.4 × 1 mm single crystals.Cs3Cu2I5 is an all inorganic copper(I)based halide luminescent material with a zero dimensional structure,and its crystal structure belongs to the orthogonal crystal system Pnma space group.Cs3Cu2I5 single crystal exhibits bright blue luminescence under 254 nm ultraviolet excitation,with a photoluminescence peak of around 445 nm and the photoluminescence quantum yield is 56.65％.This crystal exhibits a large Stokes shift(117 nm)and a photoluminescence lifetime of 984.89 ns.Cs3Cu2I5 has potential applications in blue light LEDs.
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