Recently, Cai Group & Huang Group entitled "High-Responsivity Nature-Electrolyte Undersea Photoelectrochemical Photodetector with Self-Powered Cu@GaN Nanowires Network".

In this paper, a novel natural-electrolyte self-powered photoelectrochemical (PEC) photodetector based on core-shell structured Cu@GaN nanowires (NWs) network is demonstrated and direct utilization of seawater. High quality GaN shell is encapsulated on the Cu NWs network through Ga-coating and high temperature nitridation processes. A Schottky junction along radial direction has formed at the Cu/GaN interface due to the outward diffusion of Cu into the GaN layer. Such a structure provides narrowed band detection on blue light as well as efficient carrier separation. A self-powered undersea PEC photodetector is designed with a mini-pipes connected device chamber, which allows direct indrawing of seawater and blue channel light communication (458 nm). This photodetector works stably for UOC in both shallow and deep-sea conditions in Pacific Ocean area. It shows a high responsivity up to 5.04 mA W-1 and rapid response time of 0.68 ms. This photodetector can be easily integrated to marine equipment without waterproof packaging for the future energy-saving UOC.

Connection of the thesis:

https://onlinelibrary.wiley.com/doi/10.1002/adfm.202302872