High‐Performance Flexible Self‐Powered Photodetector Based on Perovskite and Low‐Temperature Processed In2S3 Nanoflake Film. Issue 4 (18th December 2018)

• Record Type: Journal Article
• Authors: Wang, Meng; Cao, Fengren; Meng, Linxing; Tian, Wei; Li, Liang
• Is Part Of: Advanced materials interfaces. Volume 6:Issue 4(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-12-18
• Subjects: flexible -- indium sulfide -- perovskite -- photodetector -- self‐powered; Materials science -- Periodicals; 620.11
• DOI: 10.1002/admi.201801526
• Languages: English
• ISSNs: 2196-7350

Abstract

Abstract: Flexible and self‐powered perovskite photodetectors have attracted great attention due to their potential applications in the field of portable devices, sensing, and communication. Considering the physical principle of self‐power and poor resistance to high temperature of flexible polymer substrates, it is challenging to develop low‐temperature processed inorganic materials as carrier transfer layers to integrate with perovskite. Herein, a flexible self‐powered perovskite photodetector on tin‐doped indium oxide/polyethylene naphthalate substrate based on indium sulfide (In2 S3 ) nanoflake film grown at a low temperature below 373 K is demonstrated. The device shows a detectivity up to 1.1 × 10 11 Jones at +0.5 V and response time less than 200 ms. A responsivity of 451 mA W −1 at 720 nm is also achieved, which is close to the performance of device on rigid fluorine‐doped tin oxide substrate. The device exhibits outstanding stability without obvious performance degradation after 500 cycles of bending or under a 0.0025 m bending radius. Interestingly, the device can work in the outdoor to track the sunlight change for 1 day. This result opens a door to explore the integration of inorganic semiconductors with perovskite toward flexible self‐powered photodetectors built on polymer substrates. Abstract : A high‐performance self‐powered perovskite photodetector based on flexible substrate is demonstrated via a low‐temperature process. By adjusting the thickness of indium sulfide, the photodetector exhibits an outstanding responsivity and detectivity to visible light. Moreover, the device shows a good tolerance to different bending tests and has the ability to work outdoors.