3results about How to "Lower interface barrier" patented technology

This application relates to the field of cold cathode field emission material preparation technology, and discloses a method for preparing a graphene-diamond composite structure to improve the field emission performance of diamond. The method involves first dispersing nanodiamonds and graphene oxide in a deep eutectic solvent; then adding boric acid to induce an in-situ sol-gel transformation under heating, forming a gel network that locks the dispersed phase; followed by microwave-assisted interface activation and gradient high-temperature carbonization, and finally cleaning and drying to obtain the product. This invention effectively suppresses phase separation and agglomeration during pyrolysis through a gel solidification mechanism, and utilizes the deep eutectic solvent and boric acid pyrolysis to achieve in-situ co-doping of nitrogen and boron, constructing a low-barrier continuous conductive channel on the diamond surface, and realizing tight electrical interconnection between components. This method is simple and controllable, and the resulting composite material possesses excellent conductivity, low turn-on electric field, and high emission stability, thus improving the electron emission efficiency of cold cathode devices.

The invention discloses a low work function transparent conductive cathode and a preparation method thereof, the low work function transparent conductive cathode comprises a transparent substrate, an ultra-thin metal aluminum layer and an indium oxide layer which are stacked, the ultra-thin metal aluminum layer is located above the transparent substrate, the thickness of the ultra-thin metal aluminum layer is 0.5 nm-2 nm, the indium oxide layer is located above the ultra-thin metal aluminum layer, and the thickness of the indium oxide layer is 0.5 nm-2 nm. And the indium oxide layer is a zirconium and gallium doped indium oxide film with the thickness of 200nm-500nm. The invention aims to provide a low-work-function transparent conductive cathode and a preparation method thereof. The cathode structure can effectively reduce the interface contact potential barrier and realize efficient electron injection, and the preparation process is suitable for industrial production.

This invention provides a solar cell, its fabrication process, a tandem solar cell, and a photovoltaic module. The fabrication process of the solar cell includes: providing a cell substrate; printing a conductive material onto the cell substrate; and curing the conductive material to form initial grid lines. The conductive material includes bismuth-based lead-free glass; the conductive material also includes copper powder and nickel powder; the mass ratio of copper powder to nickel powder is 80~99.5:0.5~20, and the copper powder includes flake-shaped copper powder and spherical copper powder. In the fabrication process of this invention, the conductive material, through a ternary synergistic system of "copper-nickel-glass" and a dual-morphology copper powder composite design, achieves multiple effects such as suppressing copper diffusion and oxidation and improving adhesion under an air-sintering atmosphere, thereby improving the fill factor and photoelectric conversion efficiency of the solar cell.