Optimization of crystal growth and properties of γ-CuI ultrafast scintillator by the addition of LiI

[Display omitted] •Large and transparent γ-CuI single crystal with the size over 20 mm was successfully obtained for the first time.•The intensities of near-band-edge emissions of γ-CuI single crystal are greatly enhanced by Li and I dopants.•The 430 nm emission decay time is less than 450 ps under...

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