Chiral Terbium Halide for Narrow-Band X-ray Scintillation.
basic_science · Level V
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- Record sourced from PubMed, PMID 40974589.
- Also identified by DOI 10.1021/acs.nanolett.5c03789.
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Abstract
Achieving narrow-band radioluminescence remains challenging despite its critical importance in display technologies. Here, we construct the novel chiral terbium(III)-based hybrid metal halides (<i>R</i>/<i>S</i>-3BrMBA)<sub>3</sub>TbCl<sub>6</sub> (<b><i>R</i></b>/<b><i>S</i>-BMTC</b>) and systematically investigate their scintillation properties. Benefiting from the heavy atom-enhanced X-ray absorption, negligible self-absorption, and unique 4<i>f</i>-4<i>f</i> transitions of Tb<sup>3+</sup>, <b><i>R</i>-BMTC</b> exhibits excellent X-ray scintillation activity with strong radioluminescence comparable to that of the commercial Bi<sub>4</sub>Ge<sub>3</sub>O<sub>12</sub>. Most importantly, <b><i>R</i>-BMTC</b> exhibits one of the narrowest radioluminescences (∼9 nm) among the reported hybrid metal halides. Additionally, it also exhibit efficient green circularly polarized luminescence with high quantum yield (45.9%) and dissymmetry factor (4.99 × 10<sup>-3</sup>), which are essential for suppressing the optical crosstalk and enhancing the X-ray imaging quality at the boundary. Overall, our work demonstrates an efficient approach for developing the narrow-band X-ray scintillator, thereby advancing the progress of chiral rare-earth halides toward optoelectronic applications.