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Journal article
Semiconducting Organic Metal Halide Complex Glasses for Efficient X-Ray Detection
Small (Weinheim an der Bergstrasse, Germany), Vol.Online ahead of print
12/09/2025
PMID: 41363951
Web of Science ID: WOS:001632898900001
Abstract
The growing demand for efficient, low-cost, and scalable direct X-ray detectors has prompted the exploration of materials beyond conventional inorganic semiconductors, e.g., Si, α-Se, and Cd(Zn)Te. While organic semiconductors offer attractive features, including mechanical flexibility and low-temperature solution processability, they often fall short in sensitivity, energy resolution, and detection limits compared to their inorganic counterparts. Here, the first demonstration of direct X-ray detectors is reported based on a new class of materials, organic metal halide complexes (OMHCs), which are composed of metal halide species covalently bonded to organic semiconducting units. Specifically, 4-(4-(diphenylamino) phenyl)-1-(propyl)-pyridinium zinc bromide ((TPA-Py)
ZnBr
) is employed in its glassy form to fabricate high-performance direct X-ray detectors. By applying a facile melt-processing approach, wet-chemistry-synthesized (TPA-Py)
ZnBr
single crystals can be easily transformed into air-stable glassy samples with tunable dimensions for device integration. The resulting glassy OMHC-based X-ray detectors exhibit outstanding performance, including a high dark resistivity (5.37 × 10
Ω cm), an excellent detection sensitivity (2,020 µC Gy
cm
) at an electric field of 10 V mm
, and an ultralow detection limit of 12.44 nGy
s
. These results establish semiconducting OMHC glasses as a highly promising new class of materials for direct X-ray detectors.
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Details
- Title
- Semiconducting Organic Metal Halide Complex Glasses for Efficient X-Ray Detection
- Publication Details
- Small (Weinheim an der Bergstrasse, Germany), Vol.Online ahead of print
- Resource Type
- Journal article
- Publisher
- Wiley-VCH Verlag GmbH & Co. KGaA
- Number of pages
- 7
- Grant note
- National Science Foundation: DMR-2204466 SUNY research foundation of University at BuffaloYoung Scholars Program at FSU
The authors acknowledge support from the National Science Foundation (DMR-2204466). Part of this work utilized resources provided by theMaterials Characterization Laboratory (FSU075000MAC) at the FSU De-partment of Chemistry and Biochemistry. W.N. acknowledge the fundingsupport from SUNY research foundation of University at Buffalo. A.S.H.thanks the support from the Young Scholars Program at FSU.
- Copyright
- © 2025 Wiley-VCH GmbH
- Identifiers
- WOS:001632898900001; 99381568317806600
- Academic Unit
- Chemistry; Hal Marcus College of Science and Engineering
- Language
- English