Flexible Lead-Free X-ray Detector from Metal–Organic Frameworks
Zheng Li, Shuquan Chang, Haiqian Zhang, Yong Hu, Yulong Huang, Lu Au, Shenqiang Ren
Abstract
Semiconductive metal–organic frameworks (MOFs) obtained by specific host–guest interactions have attracted a large interest in the last two decades, promising development of next-generation electronic devices. Herein, we designed and presented flexible X-ray detectors using Ni-DABDT (DABDT = 2,5-diamino-1,4-benzenedithiol dihydrochloride) MOFs as the absorbing layer. The π–d coupling interactions of Ni-DABDT throughout the framework implement a conspicuous carrier transportation pathway. The detector that converts X-ray photons directly into carriers manifests an attractive achievement with high detection sensitivity of 98.6 μC Gyair–1 cm–2, with a low detection limit of 7.2 μGyair s–1 for the radiation robustness. This work provides insights for next-generation green and high-performance flexible sensor detectors by utilizing MOF materials with the benefits of a designable structure and tunable property, demonstrating a proof-of-concept in wearable X-ray detectors for radiation monitoring and imaging.