TY - JOUR
T1 - Semiconductive Coordination Polymer with Multi-Channel Charge Transfer for High-Performance Direct X-ray Detection
AU - Yu, Xiao Qing
AU - Sun, Li Bo
AU - Li, Qing Yi
AU - Wang, Bo Lun
AU - Wang, Ming Sheng
AU - Li, Ji Yang
AU - Guo, Guo Cong
AU - Yu, Ji Hong
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2025
Y1 - 2025
N2 - 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.
AB - 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.
KW - coordination polymers
KW - direct X-ray detection
KW - electronic-state manipulation
KW - multi-channel charge transfer
KW - semiconductor
UR - http://www.scopus.com/inward/record.url?scp=85213897321&partnerID=8YFLogxK
U2 - 10.1002/anie.202419266
DO - 10.1002/anie.202419266
M3 - Article
AN - SCOPUS:85213897321
SN - 1433-7851
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
ER -