As a key material that affects the conductivity of solar cells, the height, width, quantity, and other factors of solar cell grid lines will determine the photoelectric conversion rate of solar cells.

Therefore, after completing the screen printing and cleaning process for solar cells, manufacturers often need to use precise and scientific testing equipment to scientifically and reliably measure them, in order to ensure that their subsequent production can proceed smoothly and effectively.

Detailed analysis of the effect of grid lines on the performance of solar cells

The grid line of a solar cell is an important component of the metal electrode on the front of the solar cell. Its main function is to collect and transmit photo generated charge carriers, thereby achieving solar energy conversion.

Among them, the design of grid lines has an important impact on the performance of solar cells, so it is necessary to comprehensively consider factors such as the number, width, height, and shape of grid lines to achieve the best photoelectric conversion rate and output power.

The number of gate lines determines the distance between them, affecting the transmission path of lateral current and shading loss. The more gate lines there are, the shorter the transverse current transmission path, the smaller the serial resistance, and the higher the fill factor and output power.

However, the more gate lines there are, the more light they occupy, the greater the shading loss, the lower the short-circuit current and photoelectric conversion rate.

The width of the gate line determines the cross-sectional area of the gate line, which affects the resistance and shading loss of the gate line. The smaller the width of the gate line, the smaller the cross-sectional area of the gate line, the greater its resistance, and the lower the fill factor and output power.

However, the smaller the width of the gate line, the less light it occupies, the smaller the shading loss, and the higher the short-circuit current and photoelectric conversion rate. Therefore, the width of the grid line needs to find a balance point between reducing series resistance and shading loss to achieve optimal battery performance.

The height of the gate line determines the cross-sectional area of the gate line, affecting its resistance and contact resistance. The higher the height of the gate line, the larger the cross-sectional area of the gate line. The lower the resistance of the gate line, the smaller the series resistance, and the higher the fill factor and output power.

However, the higher the height of the grid line, the smaller the contact area between the grid line and the battery cell, the greater the contact resistance, and the lower the filling factor and output power.

The shape of the grating determines the shading effect and optical gain of the grating. The shape of grid lines can be divided into planar grid lines and three-dimensional grid lines. A planar gate line refers to a gate line with a rectangular or trapezoidal cross-section, which has a larger shading effect and smaller optical gain.

A three-dimensional grid line refers to a grid line with a triangular or circular cross-section, which has a small shading effect and a large optical gain. Stereoscopic grid lines can utilize the refraction and reflection of light to reintroduce partially blocked light into solar cells, thereby improving the photoelectric conversion rate of solar cells.

Therefore, the shape of the grid line needs to find a balance between reducing shading effects and increasing optical gain to achieve optimal battery performance.