Abstract: The technical solution discloses a preparation method for a solar cell and a silicon film. The preparation method comprises: forming a dielectric layer on a first main surface of a silicon substrate; forming a silicon film having a first conductive characteristic on the dielectric layer, the silicon film including a first region and a second region located outside the first region; and transforming the conductive characteristic of the first region from the first conductive characteristic to a second conductive characteristic, the first conductive characteristic being opposite to the second conductive characteristic. The preparation method simplifies a solar cell manufacturing process.

Abstract: A display panel including a display area including a first display area and a second display area; and a non-display area at least partially surrounding the display area, the non-display area including a first fan-out area located on one side of the display area along a first direction, the first fan-out area including a plurality of fan-out lines the second display area being located on at least one side of the first display area along a second direction, both the first display area and the second display area including a plurality of data lines extending along the first direction and arranged along the second direction, the data lines being electrically connected the fan-out lines, the data lines in the second display area being electrically connected to the fan-out lines through a connecting line.

Abstract: A grain mildew detection method and device based on a WiFi apparatus. The method includes the following steps: acquiring a WiFi signal which passes through a grain region, extracting channel state information (CSI) amplitude data from the WiFi signal, and acquiring grain statuses corresponding to the CSI amplitude data; establishing a neural network model, and training the neural network model by using the acquired CSI amplitude data and the grain statuses corresponding to the CSI amplitude data, to obtain an amplitude-status relationship model; and acquiring a WiFi signal which passes through a region in which grain to be detected is located, extracting CSI amplitude data from the WiFi signal which passes through the region in which the grain to be detected is located, and inputting the CSI amplitude data into the amplitude-status relationship model, to obtain a grain status of the grain to be detected.