Guan Qianwen, Ye Huang, You Shihai, Zhu Zeng-Kui, Li Hang, Liu Xitao, Luo Junhua
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Small. 2024 Mar;20(13):e2307908. doi: 10.1002/smll.202307908. Epub 2023 Nov 15.
2D multilayered organic-inorganic hybrid perovskites (OIHPs) have exhibited bright prospects for high-performance self-driven X-ray detection due to their strong radiation absorption and long carrier transport. However, as an effective tool for self-driven X-ray detection, radiation photovoltaics remain rare, and underdeveloped in multilayered OIHPs. Herein, chirality to induce radiation photovoltaics in 2D multilayered chiral OIHPs is first utilized for efficient self-driven X-ray detection. Specifically, under X-ray irradiation, a multilayered chiral-polar (S-BPEA)FAPbI (1-S, S-BPEA = (S)-1-4-Bromophenylethylammonium, FA = formamidinium) shows remarkable radiation photovoltaics of 0.85 V, which endows 1-S excellent self-driven X-ray detection performance with a considerable sensitivity of 87.8 µC Gy cm and a detection limit low to 161 nGy s. Moreover, the sensitivity is high up to 1985.9 µC Gy cm under 80 V bias, higher than most those of 2D OIHPs. These results demonstrate that chirality-induced radiation photovoltaics is an efficient strategy for self-driven X-ray detection.
二维多层有机-无机杂化钙钛矿（OIHPs）由于其强辐射吸收和长载流子传输，在高性能自驱动X射线检测方面展现出光明前景。然而，作为自驱动X射线检测的有效工具，辐射光伏在多层OIHPs中仍然罕见且发展不足。在此，首次利用手性在二维多层手性OIHPs中诱导辐射光伏效应，以实现高效自驱动X射线检测。具体而言，在X射线照射下，多层手性极性（S-BPEA）FAPbI（1-S，S-BPEA = （S）-1-4-溴苯乙铵，FA = 甲脒）展现出0.85 V的显著辐射光伏效应，赋予1-S优异的自驱动X射线检测性能，灵敏度高达87.8 μC Gy⁻¹ cm⁻²，检测限低至161 nGy s⁻¹。此外，在80 V偏压下，灵敏度高达1985.9 μC Gy⁻¹ cm⁻²，高于大多数二维OIHPs。这些结果表明，手性诱导的辐射光伏效应是自驱动X射线检测的一种有效策略。
