Semiconductive Coordination Polymer with Multi-Channel Charge Transfer for High-Performance Direct X-ray Detection

Xiao Qing Yu, Li Bo Sun, Qing Yi Li, Bo Lun Wang, Ming Sheng Wang*, Ji Yang Li*, Guo Cong Guo, Ji Hong Yu*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

Coordination polymers (CPs) are promising for direct X-ray detection and imaging owing to higher designability and outstanding stability, however, it remains a challenge to achieve highly X-ray detection performance, particularly both high sensitivity and low detection limit at the same operating voltage. Herein, we construct a new conjugated CP {[Co(BPTTz)(DIPA)] ⋅ DMA}n (1, BPTTz=2,5-bis(pyridine-4-yl)thiazolo[5,4-d]thiazole, H2DIPA=2,5-diiodoterephthalic acid, DMA=N, N’-dimethylacetamide), with multi-channel charge transfer by regulating the linker mediated electronic-state, which reduces carrier losses resulting from recombination or quenching, enhances the efficiency of charge separation and transfer, thus further optimizes X-ray detection performance. The semiconductor prepared based on this strategy achieves record values including the highest mobility-lifetime product (μτ, 8.05×10−3 cm2 V−1) and the lowest detectable X-ray dose rate (128 nGyair S−1, 35 V) among CP-based direct radiation detectors, as well as a high sensitivity (172 μC Gyair−1 cm−2, 35 V) at the same operating voltage. This detector shows excellent long-time air stability under ambient conditions for over three months and operational stability. These findings demonstrate a rational structural design method to enhance the photoelectronic efficiency and stability of semiconductive CPs.

源语言英语
期刊Angewandte Chemie - International Edition
DOI
出版状态已接受/待刊 - 2025
已对外发布

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Yu, X. Q., Sun, L. B., Li, Q. Y., Wang, B. L., Wang, M. S., Li, J. Y., Guo, G. C., & Yu, J. H. (已接受/印刷中). Semiconductive Coordination Polymer with Multi-Channel Charge Transfer for High-Performance Direct X-ray Detection. Angewandte Chemie - International Edition. https://doi.org/10.1002/anie.202419266