Basic Characteristics Of Solar Cells

The basic characteristics of solar cells include three basic characteristics: the polarity of solar cells, the performance parameters of solar cells, and the volt-ampere characteristics of solar electric environmental protection cells. The specific explanation is as follows
1. Polarity of solar cells
The silicon solar cell is generally made of P+/N type structure or N+/P type structure, P+and N+, indicating the conductive type of semiconductor material in the front light layer of the solar cell; N and P, indicating the conductive type of the semiconductor material on the back of the solar cell. The electrical properties of solar cells are related to the characteristics of semiconductor materials used in the manufacture of solar cells.
2. Performance parameters of solar cells
The performance parameters of solar cells are composed of open-circuit voltage, short-circuit current, maximum output power, filling factor, conversion efficiency, etc. These parameters are indicators to measure the performance of solar cells.
3 Volt-ampere characteristics of solar cells
The P-N junction solar cell consists of a shallow P-N junction formed on the surface, a strip and finger-shaped front ohmic contact, a back ohmic contact covering the entire back surface, and an anti-reflective layer on the front. When the battery is exposed to the solar spectrum, photons with energy less than the band gap width Eg have no contribution to the battery output. Photons with energy greater than the band gap width Eg will contribute energy Eg to the battery output, and energy less than Eg will be consumed in the form of heat. Therefore, in the design and manufacturing process of solar cells, the influence of this part of heat on the stability and life of the cells must be considered.