posted on 2024-03-13, 11:35authored byRanran Gu, Kai Han, Jiance Jin, Hao Zhang, Zhiguo Xia
Processing luminescent metal halide
microcrystals into counterpart
nanocrystals (NCs) can rationally enhance the resolution in X-ray
scintillation imaging. It remains a challenge for the controlled synthesis
of the hybrid NC luminescence materials, which is important for the
fabrication of the organic films. Herein, we design the synthesis
of copper(I)-based halide Cu6I8(bu-ted)2 (Cu6I8C20H42N4) (bu-ted: 1-butyl-1,4-diazabicyclo [2.2.2] octan-1-ium) NCs
via a surfactant-assisted method utilizing surface tension to limit
the crystal size. Cu6I8(bu-ted)2 NCs
with prominent near-to-unity photoluminescence quantum yield results
in ultrahigh light output that is calculated to be 480% of a commercial
Lu3Al5O12:Ce3+ scintillator
with a low detection limit of 32 nGy/s. X-ray imaging with a spatial
resolution of 17 lp mm–1 is demonstrated based on
the fabrication of large-area Cu6I8(bu-ted)2 composite scintillation screens. This study provides a foundation
method to nanocrystallize the copper(I)-based hybrid halide scintillators
for prominent X-ray imaging.