A robust photoelectrochemical photodetectors based on the self-healing properties of Bi2O2S nanoplates

Sulfur oxygen bismuth (Bi2O2S), as a newly emerging two-dimensional material in the domain of optoelectronics, was increasingly concerned by researchers due to its high carrier lifetime and unique loose structure. Herein, we built a photoelectrochemical (PEC) type photodetectors (PDs) based Bi2O2S nanoplates exhibiting the excellent optical response switching behaviors with the high responsivity (2.31 mA/W) at 0.6 V potential and the rapid response time (similar to 0.08 s), as well as the great long-term stability and durability (over one month). Meanwhile, we demonstrated the self-healing properties in alkaline by testing the open-circuit potential (OCP) time profile. The lifetime of photo-generated carriers can be extended in this process, which in turn enables the detector to operate for a long time. In this way, the PDs based Bi2O2S nanoplates enriched its basic research in the field of photo-electrochemical and paved the way for the research of energy storage devices.

Automated summary

In this study, a high-performance photodetector based on Bi2O2S nanoplates was developed, demonstrating excellent optical response switching behaviors and long-term stability, as well as showing self-healing properties in alkaline environments.