부산대학교 도서관

Zero-dimensional organic-inorganic metal halides have shown various applications in X-ray detection. However, the mechanism of energy distribution (direct and indirect detection interactions) needs further clarification, and real application reliability (pulsed X-ray and 3D imaging) requires further study. Herein, we designed and synthesized a representative MHs, TBACuI2 (TBA $^{+} $ : tetrabutylammonium cation). Experimental and theoretical analyses demonstrate that the energy of luminescent excitons and conducting carriers will not be readily interconverted. Also, the X-ray specific response was achieved, and high sensitivity ( $45000~\mu $ CGy $^{-{1}}$ cm2), low shot noise ( $1.68\times 10 ^{-{4}}$ nAHz $^{-{1}/{2}}$ ), and superior stability (long time and high energy irradiation or immersion in water) were obtained. Importantly, the device has a high cutoff frequency ( $>$ 140 Hz) for pulsed X-rays, meeting the needs of medical dynamic imaging (10 Hz). Additionally, the demonstration of 3D reconstruction imaging with direct detectors was achieved.