Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 42, Pages 18605-18610Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202010290
Keywords
chalcogenide semiconductors; open frameworks; X-ray detection; zeolites
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Funding
- National Natural Science Foundation of China [21671142, 21875150]
- 111 Project [D20015]
- Project of Scientific and Technologic Infrastructure of Suzhou [SZS201905]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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A wide range of tunability in the physical parameters of a semiconductor used for X-ray detection is desirable to achieve targeted performance optimization. However, in a dense-phase semiconductor, fine-tuning one parameter often leads to unwanted changes in other parameters. Herein, the intrinsic openness in an open-framework semiconductor has been confirmed, for the first time, to be a key structural factor that weakens the mutual exclusivity of the adjustable physical parameters owing to a non-linear control mechanism. The controllable doping of S in a zeolitic In-Se host results in an optimal balance between resistivity, band gap, and carrier mobility, which finally results in an excellent X-ray detector with a high figure of merit for the mobility-lifetime product (7.12x10(-4) cm(2) V-1); this value is superior to that of a commercial alpha-Se detector. The current strategy of choosing open-framework semiconductor materials opens a new window for targeting high-performance X-ray detection.
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