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Direct X-ray Detectors Based on an Eco-Friendly Semiconducting Zero-Dimensional Organic Zinc Bromide Hybrid
Letter/Communication

Direct X-ray Detectors Based on an Eco-Friendly Semiconducting Zero-Dimensional Organic Zinc Bromide Hybrid

Oluwadara J. Olasupo, Thanh-Hai Le, Tunde B. Shonde, He Liu, Alexander Bouchard, Sara Bouchard, Thilina N. D. D. Gamaralalage, Abiodun M. Adewolu, Tarannuma F. Manny, Xinsong Lin, …
ACS energy letters, Vol.9(12), pp.5704-5711
12/13/2024
DOI: https://doi.org/10.1021/acsenergylett.4c02662
Web of Science ID: WOS:001346941000001

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15 Times Cited - Web of Science

Abstract

Direct X-ray detectors that convert X-rays to electrical charges have broad applications in medicine and security screening. Common semiconductors like silicon and selenium for direct X-ray detectors have limitations in performance, versatility, and cost-effectiveness. Among new materials under investigation, metal halide perovskites demonstrate great potential for X-ray detectors; however, they are limited by low stability and toxicity. Here, we report, for the first time, a stable and eco-friendly zero-dimensional (0D) organic metal halide hybrid (OMHH), (TPAP)2ZnBr4, for efficient X-ray detectors. With molecular sensitization, wherein metal halides (ZnBr42−) act as X-ray absorbers and organic semiconducting components (TPA-P+, 4-(4-(diphenylamino)phenyl)-1-propylpyridin-1-ium) as charge transporters, 0D (TPA-P)2ZnBr4 detectors exhibit an impressive sensitivity of 2,292 μC Gyair−1 cm−2 at 20 V and a low detection limit of 37.5 nGyair s−1. The exceptional stability of 0D (TPA-P)2ZnBr4 facilitates remarkably stable direct X-ray detection and shows the tremendous potential of rationally designed 0D OMHHs as new-generation radiation detection materials.

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