Abstract: The disclosure discloses a photovoltaic cell, a photovoltaic cell array, a solar cell, and a method for preparing a photovoltaic cell. The photovoltaic cell includes: a silicon wafer, a gate line layer, a side electrode, a first electrode, a back electrical layer, and a second electrode. The silicon wafer includes a silicon substrate, a front diffusion layer, a side division layer, and a back division layer. At least a part of at least one of the side division layer and the back division layer is a diffusion layer whose type is the same as that of the front diffusion layer. The gate line layer is disposed on the front diffusion layer. The side electrode is disposed on the side division layer and is electrically connected to the gate line layer. The first electrode is disposed on the back division layer and is electrically connected to the side electrode. The back electrical layer and the second electrode are both disposed on a back surface of the silicon wafer.

Abstract: A solar cell array comprises a plurality of cells. Each cell has a front surface on which light is incident when the cell is in operation and a back surface opposite to the front surface. The solar cell array also comprises a plurality of conductive wires. Adjacent cells are connected by the plurality of conductive wires. The solar cell array further comprises secondary grid lines disposed on the front surface of the respective cell. The secondary grid lines comprise middle secondary grid lines disposed in the middle of the respective cell and intersecting with the conductive wires, and edge secondary grid lines disposed on the edges of the respective cell and non-intersecting with the conductive wires. The solar cell array also comprises short grid lines disposed on the front surface of the cell. The short grid lines connect the edge secondary grid lines with the conductive wires or with at least one middle secondary grid line.