Issue

Vol. 12 (2020)

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

https://doi.org/10.1007/s40820-020-0371-0
Vincenzo Pecunia
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
Yue Yuan
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
Jing Zhao
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
Kai Xia
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
Yan Wang
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
Steffen Duhm
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
Luis Portilla
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
Fengzhu Li
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

Corresponding Author: Vincenzo Pecunia

vp293@suda.edu.cn

Nano-Micro Letters, Vol. 12 (2020), Article Number: 27

Abstract

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 Ag2BiI5 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−1 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 Ag2BiI5 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 Ag2BiI5 toward emerging applications on low-cost and low-power NIR-blind visible light photodetector.


Highlights:


1 The photodetection capabilities of emerging perovskite-inspired lead-free Ag2BiI5 are investigated.
2 In self-powered mode, a near-constant photoresponse through the visible with a NIR rejection ratio of > 250 is obtained.
3 Optoelectronic characterization provides insight into the interplay among efficiency, collection distance, and film micro-/nano-structure.

Keywords

Perovskite-inspired semiconductor Silver bismuth iodide Self-powered photodetector NIR-blind photodetector Visible light photodetector
Pecunia, Vincenzo, Yue Yuan, Jing Zhao, Kai Xia, Yan Wang, Steffen Duhm, Luis Portilla, and Fengzhu Li. 2020. “Perovskite-Inspired Lead-Free Ag2BiI5 for Self-Powered NIR-Blind Visible Light Photodetection”. Nano-Micro Letters 12 (January):27. https://doi.org/10.1007/s40820-020-0371-0.
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