High-Resolution X-ray Imaging Based on Solution-Phase-Synthesized Cs₃Cu₂I₅ Scintillator Nanowire Array

Abstract

Lead-free copper halide scintillators have shown tremendous potential applications in X-ray detection and imaging. However, the imaging resolution is still rather limited due to the lack of a scintillation waveguide, especially for the solution-processed nanocrystal scintillators. Here, we report a solution synthesis route for Cs3Cu2I5 nanowire (NW) arrays via an anodized aluminum oxide (AAO) template-assisted in situ growth. As the NWs grow, the precursor concentration directly affects the length and uniformity of the Cs3Cu2I5 NWs among the various factors. The as-synthesized Cs3Cu2I5 NW array scintillators achieve a high spatial resolution of 20 lp mm–1, which is so far the highest value for this emerging copper halide scintillators. The present study provides a convenient and facile method to synthesize Cs3Cu2I5 NW arrays for high-resolution X-ray imaging.

Novel, Green, and Scalable Aqueous Synthesis of Yellow–Green Emitting Cs3Cu2Cl5 Scintillator and its Application in High‐Resolution TFT Panel for X‐Ray Imaging Detector

“…The full widths at half maximum (FWHM) of the PL spectra is ≈106.7 nm, similar to those previously reported for low-dimensional metal halides with STEs. [2,18,[34][35][36] It is of note that the overlapping area of PLE and PL is small, indicating the ignorable self-absorption, which provides a certain prerequisite for the high light yield as expected. [9] Small overlapping between normalized UV-vis absorption and PL spectra is also observed (Figure S4, Supporting Information).…”

Bright lead-free Cs3Cu2I5 perovskite scintillators for thermal neutron detection

“…35 Under X-ray radiation, copper-based perovskite scintillators exhibit high spatial resolution, excellent linear response, and low dose rate limit. [36][37][38] A 6 Li-doped Cs 3 Cu 2 I 5 single crystal has a light yield of 96 000 ph per neutron for thermal neutron radiation, which implies their potential in thermal neutron detection. 38 However, the neutron absorption efficiency of the crystal scintillator is restricted by the doping content, and the area of the scintillation screen is limited for some applications.…”

In situ precipitation of Cs3Cu2I5 nanocrystals in inorganic glass with long-term water stability for X-ray imaging

“…[19][20][21][22][23][24][25] In addition, Cs 3 Cu 2 I 5 NCs exhibit optical properties comparable to those of other bulk materials such as Cs 3 Cu 2 I 5 powders, Cs 3 Cu 2 I 5 films, and so on. [26][27][28] Inspired by these works, we try to precipitate Cs 3 Cu 2 I 5 NCs in glass.…”