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Chirality Inducing Polar Photovoltage in a 2D Lead-Free Double Perovskite toward Self-Powered X-ray Detection AITranslate

Jianbo Wu; Shihai You; Panpan Yu; Qianwen Guan; ZengKui Zhu; Zhou Li; Chang Qu; Haiqing Zhong; Lina Li; Junhua Luo;
China|University of Chinese Academy of Sciences; Fujian Institute of Research on the Structure of Matter; Jiangxi Normal University; China|University of Chinese Academy of Sciences; Fujian Institute of Research on the Structure of Matter; Fujian Institute of Research on the Structure of Matter; Fujian Institute of Research on the Structure of Matter; Fujian Institute of Research on the Structure of Matter; China|University of Chinese Academy of Sciences; Jiangxi Normal University
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Abstract AITranslate

Lead-free halide double perovskites (HDPs) have sparked broad interest in developing “green” photodetectors; however, self-powered X-ray detectors in this family remain elusive. Here, by exploiting the chirality-induced polar photovoltaic effect in a chiral-polar 2D HDP, (R-MPA)4AgBiI8 (1, R-MPA = R-β-methylphenethylammonium), we successfully realized self-powered X-ray detection. The significant spontaneous electric polarization in 1 gives it a large polar photovoltage of 0.36 V, which drives the separation and transport of X-ray-generated carriers, thus acquiring the capability of self-powered detection. Consequently, X-ray detectors based on high-quality single crystals of 1 exhibit a high sensitivity of 46.3 μC Gy–1 cm–2 and an ultralow detection limit of 85 nGy s–1 at zero bias. The sensitivity can be further increased to 949.6 μC Gy–1 cm–2 at 50 V bias, outperforming all current 2D HDP detectors. Our work is the first to demonstrate self-powered X-ray detection in single-phase lead-free HDPs, enlightening future design of “green” self-powered radiation detectors.

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DOI：https://doi.org/10.1021/acsenergylett.3c00629

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Citation Information:

Lead-free halide double perovskites (HDPs) have sparked broad interest in developing “green” photodetectors; however, self-powered X-ray detectors in this family remain elusive. Here, by exploiting the chirality-induced polar photovoltaic effect in a chiral-polar 2D HDP, (R-MPA)4AgBiI8 (1, R-MPA = R-β-methylphenethylammonium), we successfully realized self-powered X-ray detection. The significant spontaneous electric polarization in 1 gives it a large polar photovoltage of 0.36 V, which drives the separation and transport of X-ray-generated carriers, thus acquiring the capability of self-powered detection. Consequently, X-ray detectors based on high-quality single crystals of 1 exhibit a high sensitivity of 46.3 μC Gy–1 cm–2 and an ultralow detection limit of 85 nGy s–1 at zero bias. The sensitivity can be further increased to 949.6 μC Gy–1 cm–2 at 50 V bias, outperforming all current 2D HDP detectors. Our work is the first to demonstrate self-powered X-ray detection in single-phase lead-free HDPs, enlightening future design of “green” self-powered radiation detectors.

quote

GB/T 7714-2015 [1] Jianbo Wu, Shihai You, Panpan Yu, et al. ACS Energy Letters, 2023(8). DOI:10.1021/acsenergylett.3c00629.
MLA [1] Jianbo Wu, et al., ACS Energy Letters, no. 8, 2023, https://doi.org/10.1021/acsenergylett.3c00629.
APA [1] Jianbo Wu, Shihai You, Panpan Yu, Qianwen Guan, ZengKui Zhu, Zhou Li, Chang Qu, Haiqing Zhong, Lina Li, & Junhua Luo. (2023). ACS Energy Letters(8). https://doi.org/10.1021/acsenergylett.3c00629
IEEE [1] Jianbo Wu, Shihai You, Panpan Yu, Qianwen Guan, ZengKui Zhu, Zhou Li, Chang Qu, Haiqing Zhong, Lina Li, and Junhua Luo, ACS Energy Letters, no. 8, 2023, doi: 10.1021/acsenergylett.3c00629.