The invention designs a 0D / 2D Cu-coated CuO / MoS2
heterojunction of a Cu-coated CuO core-shell structure enhanced TMDCs
system, and the 0D / 2D Cu-coated CuO / MoS2
heterojunction can realize efficient
photoelectric conversion and is applied to a high-sensitivity photoelectric
detector. According to the invention, a core-shell
plasma structure is obtained through a
metal surface
thermal oxidation technology, and a type-II 0D / 2D Cu-coated CuO / MoS2
heterojunction is constructed. On one hand, a built-in
electric field is formed by a
plasma shell layer material CuO and MoS2, so that separation of photo-induced
electron-hole pairs can be promoted,
hot electrons of LSPR (Local Surface
Plasma Resonance) can be injected into a MoS2 layer in cooperation, the
photoelectric conversion efficiency of a heterojunction
system is improved, the contradiction between light absorption and carrier separation of a traditional heterojunction
system is solved, and the
photoelectric conversion efficiency of the heterojunction system is improved. And the response speed of the device is improved. And on the other hand, the shell layer material CuO can reduce interface damage caused by
metal /
semiconductor contact, so that the problem of high
dark current accompanied by the
plasma type photoelectric
detector under high
light response is solved. Compared with a traditional plasma type device only paying attention to light absorption, the plasma / TMDCs system heterojunction photoelectric
detector designed by the invention effectively solves the problem of low response speed and shows excellent
photoelectric conversion efficiency. The method is of great significance to development of low-dimensional
hybrid heterojunction photoelectric detectors.