Journal article
Solution‐Processed Amorphous Zero‐Dimensional Organic Metal Halide Hybrid Films for Direct X‐Ray Detectors
Angewandte Chemie International Edition, Vol.64, e202509589
08/25/2025
Metrics
8 Record Views
Abstract
Zero-dimensional (0D) organic metal halide hybrids (OMHHs) are emerging materials with significant potential for optoelectronic applications, including direct X-ray detectors. While 0D OMHH single crystals exhibit excellent X-ray detection properties, their scalability remains a significant challenge due to the time-intensive growth process and difficulty in producing large single crystals exceeding a few centimeters. This limitation hinders their practicality for large-area detector applications. Here, we report for the first time the development of amorphous 0D OMHH films via solution processing for efficient direct X-ray detection. By reacting a non-crystalline organic halide, triphenyl(9-phenyl-9H-carbazol-3-yl)phosphonium bromide (TPPCarzBr), with zinc bromide (ZnBr2), we have successfully produced amorphous 0D (TPPCarz)2ZnBr4 films with controlled thickness via facile solution processing. The organic cations (TPPCarz⁺) feature a lower bandgap than the ZnBr42− anions, enabling efficient molecular sensitization, where ZnBr42− anions serve as X-ray absorbers and TPPCarz⁺ cations as charge transporters. Direct X-ray detectors based on 0D (TPPCarz)2ZnBr4 films demonstrate outstanding performance, achieving a stable X-ray detection sensitivity of 2,165 µC Gyair⁻1cm⁻2 at 20 V mm⁻¹ and a detection limit of 6.01 nGyair s⁻¹. The amorphous nature of these films enhances their processability, allowing for fabrication in various sizes and shapes, and making them highly adaptable for scalable detector applications.
Related links
Details
- Title
- Solution‐Processed Amorphous Zero‐Dimensional Organic Metal Halide Hybrid Films for Direct X‐Ray Detectors
- Publication Details
- Angewandte Chemie International Edition, Vol.64, e202509589
- Resource Type
- Journal article
- Publisher
- Wiley-VCH Verlag GmbH & Co. KGaA
- Grant note
- National Science Foundation. Grant Number: DMR-2204466 FSU Materials Characterization Laboratory. Grant Number: FSU075000MAC
- Copyright
- © 2025 Wiley-VCH GmbH
- Identifiers
- 99381442986706600
- Academic Unit
- Chemistry; Hal Marcus College of Science and Engineering
- Language
- English