Direct Radiation Detection by a Semiconductive Metal–Organic Framework

作者：Yaxing Wang, Xin Liu, Xiaoyan Li, Fuwan Zhai, Siqi Yan, Ning Liu, Zhifang Chai, Yadong Xu, Xiaoping Ouyang, Shuao Wang · 发表于：Journal of the American Chemical Society · 年份：2019 · DOI：10.1021/jacs.9b01270 · 被引用次数：136 · 研究领域：Luminescence Properties of Advanced Materials、Radiation Detection and Scintillator Technologies、Metal-Organic Frameworks: Synthesis and Applications

Semiconductive metal–organic frameworks (MOFs) have attracted extraordinary research interest in recent years; however, electronic applications based on these emerging materials are still in their infancy. Herein, we show that a lanthanide-based semiconductive MOF ( SCU-12 ) can effectively convert X-ray photons to electrical current signals under continuous hard X-ray radiation. The semiconductive MOF-based polycrystalline detection device presents a promising X-ray sensitivity with the value of 23.8 μC Gy air –1 cm –2 under 80 kV p X-ray exposure, competitive with the commercially available amorphous selenium ( α -Se) detector. The lowest detectable X-ray dose rate is 0.705 μGy s –1, representing the record value among all X-ray detectors fabricated by polycrystalline materials. This work discloses the first demonstration of hard radiation detection by semiconductive MOFs, providing a horizon that can guide the synthesis of a new generation of radiation detection materials by taking the advantages of structural designability and property tunability in the MOF system.