PUB-2018-ASP

A Self-Powered and Flexible Organometallic Halide Perovskite Photodetector with Very High Detectivity

"Siu-Fung Leung, Kang-Ting Ho, Po-Kai Kung, Vincent K. S. Hsiao, Husam N. Alshareef, Zhong Lin Wang, Jr-Hau He" A Self-Po​wered and Flexible Organometallic Halide Perovskite Photodetector with Very High Detectivity
​Adv. Mater., DOI: 10.1002/adma.201704611
Siu-Fung Leung, Kang-Ting Ho, Po-Kai Kung, Vincent K. S. Hsiao, Husam N. Alshareef, Zhong Lin Wang, Jr-Hau He
self-power; flexible; Perovskite; photodetector
2018
​Flexible and self-powered photodetectors (PDs) are highly desirable for applications in image sensing, smart building, and optical communications. In this paper, a self-powered and flexible PD based on the methylammonium lead iodide (CH3NH3PBI3) perovskite is demonstrated. Such a self-powered PD can operate even with irregular motion such as human finger tapping, which enables it to work without a bulky external power source. In addition, with high-quality CH3NH3PBI3 perovskite thin film fabricated with solvent engineering, the PD exhibits an impressive detectivity of 1.22 × 1013 Jones. In the self-powered voltage detection mode, it achieves a large responsivity of up to 79.4 V mW−1 cm−2 and a voltage response of up to ≈90%. Moreover, as the PD is made of flexible and transparent polymer films, it can operate under bending and functions at 360 ° of illumination. As a result, the self-powered, flexible, 360 ° omnidirectional perovskite PD, featuring high detectivity and responsivity along with real-world sensing capability, suggests a new direction for next-generation optical communications, sensing, and imaging applications.