A robust 3D self-powered photoelectrochemical type photodetector based on MoSe2 nanoflower

Molybdenum selenide (MoSe 2 ) has been extensively studied in recent years due to its strong absorption for sunlight and unique band structure. Herein, a self-assembly three-dimensional (3D) MoSe 2 nanoflowers were prepared by a two-step process. Significantly, the photodetection device based on MoSe 2 nanoflowers exhibited a maximum responsivity about 12.39 µA W −1 and a rapid photo-response time about 0.15 s at 0 V bias under simulated sunlight exposure benefiting from its large specific surface area and unique morphologic structure. Meanwhile, we demonstrated the outstanding stability after 2 weeks of the photodetection device. In this way, the MoSe 2 nanoflower-based photodetectors enriched the basic research of molybdenum selenide and provided some reference for the following researches based on molybdenum selenide.