Zero‐Dimensional Luminescent Metal Halide Hybrids Enabling Bulk Transparent Medium as Large‐Area X‐Ray Scintillators

Abstract

Scintillators are critical in medical imaging, non‐destructive security screening, and space exploration applications. However, it still remains a challenge to achieve large‐area and high‐transparency scintillators by a low‐cost and easy‐to‐implement way. Herein, a large transparent medium with a diameter over 10 cm is prepared via a facile melt‐quenching strategy using a stoichiometric mixture of ethyltriphenylphosphonium bromide (ETPBr) and MnBr2 as raw materials. Benefiting from the crystallization behavior of high‐efficiency green‐emitting (ETP)2MnBr4 nanocrystals hybridized with amorphous phase in the transparent wafer, the (ETP)2MnBr4‐based transparent medium as a scintillator evidences a high transparency (over 80%, ranging from 500 to 800 nm), a high light yield of ≈35 000 ± 2000 photon per MeV, a low detection limit of 103 nGy S–1, and a competitive spatial resolution of 13.4 lp mm–1 for X‐ray imaging. This work offers a distinctive simple and fast melt‐quenching methodology to fabricate (ETP)2MnBr4 metal halide X‐ray scintillator wafer with large‐area and shape flexibility, excellent transparency, and high scintillation performance for the medical or industrial X‐ray imaging application.

Thermally Activated Delayed Fluorescence Zirconium‐Based Perovskites for Large‐Area and Ultraflexible X‐ray Scintillator Screens

“…In comparison, the thinner films not only possess ultrasoft properties but also enable high transparency that may bring high resolution in X-ray imaging. [50,51] To demonstrate the scintillation performance of Cs 2 ZrCl 6 @ PDMS, we first compared the absorption coefficient of Cs 2 ZrCl 6 @PDMS as a function of photon energies with three conventional scintillators. As shown in Figure 3b, the absorption coefficient of the flexible films is comparable to that of CsI:Tl and LYSO:Ce.…”

0D Organic Manganese(II) Bromide Hybrids as Stable and Efficient X‐Ray Scintillator

“…The peaks correspond to the 6 A 1 → 4 G and 6 A 1 → 4 D electronic transitions of Mn 2+ . [ 26,29,30 ] The emission band peaks at 518 nm with a full width at half maximum of 65 nm. It is associated with the 4 T 1 (G) → 6 A 1 radiative transition of tetrahedrally coordinated Mn 2+ ions in [MnBr 4 ] 2− unit.…”

“…4 D electronic transitions of Mn 2þ . [26,29,30] The emission band peaks at 518 nm with a full width at half maximum of 65 nm. It is associated with the 4 T 1 (G) !…”

Hydrogen bonding-mediated assembly of carbon dot@Zr-based metal organic framework as a multifunctional fluorescence sensor for chlortetracycline, pH and temperature detection

“…3c). The quantum yield of the CDs@UiO-66(COOH) 2 -50 composite was calculated to be 4.72% according to the equation: η QE = I S /(ER − ES), 39 in which ES and I S are the PL excitation and emission spectra of the sample, respectively. ER is the spectra of the excitation light of the empty integrated sphere.…”