2results about How to "Lower saturation current density" patented technology

The utility model discloses a high-performance groove type IGBT device structure, which relates to the field of semiconductor devices and comprises a substrate of a first conductive type and an active region prepared in a central region of the substrate. A second conductive type base region corresponding to the front surface of the substrate and traversing the active region, and a first conductive type carrier storage layer traversing the second conductive type base region are arranged in the first conductive type substrate; the first conduction type carrier storage layer divides the second conduction type base region into a second conduction type first base region and a second conduction type second base region, and the second conduction type first base region is located above the second conduction type second base region; the first conductive type carrier storage layer is isolated from the first conductive type substrate through the second conductive type second base region. According to the IGBT device, the influence of the first conductive type charge storage layer on the breakdown voltage of the device is eliminated, and the IGBT device has relatively small saturation voltage drop and good switching characteristics.

This application relates to the photovoltaic field, providing a solar cell and a photovoltaic module. The solar cell includes: a substrate, the surface of which has a first region and a second region arranged at intervals, at least one of the first regions comprising a first part and a second part; a doped layer located within the substrate adjacent to the surface of the first part, the doping concentration of the doped layer being greater than the doping concentration of the substrate; a conductive layer located on the surface of the first region; a passivation layer located on the surfaces of the conductive layer and the second region; and a plurality of electrodes arranged at intervals along a first direction, the electrodes extending along a second direction, each electrode facing the second part, the electrodes being disposed on the side of the conductive layer away from the substrate and electrically connected to the conductive layer. The solar cell and photovoltaic module provided by this application can at least improve the photoelectric conversion efficiency.