Polyoxometalates (POMs) have shown prominence in the field of semiconductive materials in recent years. However, electronic applications based on these emerging materials are still in their early stages. Here, a sensitive and water-stable F-PEA-ZnW₁₂ X-ray detector has been designed and constructed for hard X-ray detection and imaging. Supramolecular interactions of H···O bonding, electrostatic, and anion–π interactions not only enable FPEA-ZnW₁₂ excellent water stability but also shorten the distance between [ZnW₁₂O₄₀]^6– clusters, which reduces ion migration and dark current simultaneously, resulting in the conductivity of 3.2 × 10^–11 S cm^–1. Furthermore, the heteropoly blue formed on the surface of the O-FPEA-ZnW₁₂ wafer device promotes the effective separation and extraction of X-ray-induced carriers, enhancing the sensitivity for X-ray detection. The R/O-FEPA-ZnW₁₂ wafer device yields a high sensitivity of 3.1 × 10⁴ μC Gy_air^–1 cm^–2 with the lowest detectable dose rate of 69 nGy_air s^–1 under 120 kV hard X-ray irradiation. In addition, the O-FPEA-ZnW₁₂ wafer detector exhibits the potential for X-ray detection in water with a sensitivity of 1.0 × 10⁴ μC Gy_air^–1 cm^–2. Moreover, the fabricated POM X-ray detector shows excellent X-ray imaging capability and long-term operational stability without any attenuation of 1 year exposure to air without any encapsulation.

中文翻译：

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超分子相互作用增强多金属氧酸盐的水稳定且灵敏的 X 射线探测器


近年来，多金属氧酸盐（POM）在半导体材料领域表现出突出的地位。然而，基于这些新兴材料的电子应用仍处于早期阶段。在这里，设计和构建了一种灵敏且水稳定的 F-PEA-ZnW ₁₂ X 射线探测器，用于硬 X 射线探测和成像。 H·O键、静电和阴离子-π相互作用的超分子相互作用不仅使FPEA-ZnW ₁₂具有优异的水稳定性，而且缩短了[ZnW ₁₂ O ₄₀ ] ^6-团簇之间的距离，从而减少了离子迁移和暗电流同时，电导率为 3.2 × 10 ^–11 S cm ^–1 。此外，O-FPEA-ZnW ₁₂晶圆器件表面形成的杂多蓝促进了X射线诱导载流子的有效分离和提取，提高了X射线检测的灵敏度。 R/O-FEPA-ZnW ₁₂晶圆器件在 120 kV 硬 X 射线照射下可产生 3.1 × 10 ⁴ μC Gy _Air ^–1 cm ^–2的高灵敏度，最低可检测剂量率为 69 nGy _Air s ^–1 。此外，O-FPEA-ZnW ₁₂晶圆探测器具有在水中进行 X 射线检测的潜力，灵敏度为 1.0 × 10 ⁴ μC Gy_空气^–1 cm ^–2 。此外，所制造的POM X射线探测器表现出优异的X射线成像能力和长期运行稳定性，在没有任何封装的情况下暴露在空气中1年没有任何衰减。