Pecunia Vincenzo, Yuan Yue, Zhao Jing, Xia Kai, Wang Yan, Duhm Steffen, Portilla Luis, Li Fengzhu
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, People's Republic of China.
Nanomicro Lett. 2020 Jan 20;12(1):27. doi: 10.1007/s40820-020-0371-0.
In recent years, solution-processible semiconductors with perovskite or perovskite-inspired structures have been extensively investigated for optoelectronic applications. In particular, silver-bismuth-halides have been identified as especially promising because of their bulk properties and lack of heavily toxic elements. This study investigates the potential of AgBiI for near-infrared (NIR)-blind visible light photodetection, which is critical to emerging applications (e.g., wearable optoelectronics and the Internet of Things). Self-powered photodetectors were realized and provided a near-constant ≈ 100 mA W responsivity through the visible, a NIR rejection ratio of > 250, a long-wavelength responsivity onset matching standard colorimetric functions, and a linear photoresponse of > 5 orders of magnitude. The optoelectronic characterization of AgBiI photodetectors additionally revealed consistency with one-center models and the role of the carrier collection distance in self-powered mode. This study provides a positive outlook of AgBiI toward emerging applications on low-cost and low-power NIR-blind visible light photodetector.
近年来，具有钙钛矿或钙钛矿启发结构的可溶液加工半导体已被广泛研究用于光电子应用。特别是，卤化银铋因其整体性质以及缺乏剧毒元素而被认为特别有前景。本研究调查了AgBiI用于近红外（NIR）盲可见光光电探测的潜力，这对新兴应用（如可穿戴光电子和物联网）至关重要。实现了自供电光电探测器，其在可见光范围内提供了近恒定的≈100 mA W响应度、大于250的近红外抑制比、与标准比色函数匹配的长波长响应度起始点以及大于5个数量级的线性光响应。AgBiI光电探测器的光电特性还揭示了与单中心模型的一致性以及载流子收集距离在自供电模式中的作用。本研究为AgBiI在低成本、低功耗NIR盲可见光光电探测器的新兴应用方面提供了积极的前景。
