Perovskite-Inspired Lead-Free Ag2BiI5 for Self-Powered NIR-Blind Visible Light Photodetection

• DOI: 10.1007/s40820-020-0371-0
• Publication Date: 2020-01-20T03:02:36Z
• Authors: Vincenzo Pecunia; Yue Yuan; Jing Zhao; Kai Xia; Yan Wang; Steffen Duhm; Luis Portilla; Fengzhu Li
• Keywords: Photodetection; Visible spectrum; Specific detectivity

Abstract In recent years, solution-processible semiconductors with perovskite or perovskite-inspired structures have been extensively investigated for optoelectronic applications. particular, silver–bismuth–halides identified as especially promising because of their bulk properties and lack heavily toxic elements. This study investigates the potential Ag 2 BiI 5 near-infrared (NIR)-blind visible light photodetection, which is critical to emerging applications (e.g., wearable optoelectronics Internet Things). Self-powered photodetectors were realized provided a near-constant ≈ 100 mA W −1 responsivity through visible, NIR rejection ratio > 250, long-wavelength onset matching standard colorimetric functions, linear photoresponse orders magnitude. The characterization additionally revealed consistency one-center models role carrier collection distance in self-powered mode. provides positive outlook toward on low-cost low-power NIR-blind photodetector.