"Green" Lead-Free Tellurite Glasses Used for Stable and Efficient X-Ray Detection and Array Imaging.
basic_science · Level V
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- Record sourced from PubMed, PMID 41001965.
- Also identified by DOI 10.1002/adma.202511702.
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Abstract
Glass with the advantages of low cost, large area preparation, simple preparation process, and shape-controllable, has been widely used in the electric and optical fields. In this work, two novel sensitive X-ray detectors are reported using BaO-TeO<sub>2</sub>-MoO<sub>3</sub> (BTM) glass and BaO-TeO<sub>2</sub>-WO<sub>3</sub> (BTW) glass. Under 120 keV hard X-ray radiation, the BTM glass and BTW glass X-ray detectors exhibit sensitivities of 309 and 316 µC Gy<sub>air</sub> <sup>-1</sup> cm<sup>-2</sup>, with minimum detection limits of 7.3 and 5.4 nGy<sub>air</sub> s<sup>-1</sup>, respectively. Although the BTM glass and BTW glass X-ray detectors are determined to be 239 and 287 µC Gy<sub>air</sub> <sup>-1</sup> cm<sup>-2</sup> under the 40 keV soft X-ray radiation, the minimum detection limits are decreased to 5.7 and 3.2 nGy<sub>air</sub> s<sup>-1</sup>, which are 1000 times lower than the medical detection limit (5.5 µGy<sub>air</sub> s<sup>-1</sup>). The array detector assembled with drawn glass used as an isolated pixel without signal crosstalk displays uniform dark current and X-ray photocurrent, resulting in clear edge X-ray imaging patterns. In our work, a novel glass application has been realized and provides a potential commercial X-ray detector.