Introduction to the basic characteristics of solar cells

1. Polarity of solar cells: silicon solar cells are generally made of P+/N type structure or N+/P type structure. P+ and N+ indicate the conductivity type of the semiconductor material of the front light layer of the solar cell; N and P indicate the solar cell The conductivity type of the semiconductor material of the back substrate. The electrical properties of solar cells are related to the characteristics of the semiconductor materials used to manufacture the cells. 2. The performance parameters of solar cells: the performance parameters of solar cells are composed of open circuit voltage, short circuit current, larger output power, fill factor, conversion efficiency, etc. These parameters are a measure of the performance of solar cells. 3 Volt-ampere characteristics of solar cells: The PN junction solar cell group contains a shallow PN junction formed on the surface, a strip-shaped and finger-shaped front ohmic contact, a back ohmic contact covering the entire back surface, and a layer of resistance on the front Reflective layer. When the battery is exposed to the solar spectrum, photons with energy less than the band gap Eg do not contribute to the output of the battery. Only the photons with energy greater than the band gap Eg will contribute energy Eg to the battery output, and the energy less than Eg will be consumed in the form of heat. Therefore, in the design and manufacturing process of solar cells, it is necessary to consider the influence of this part of the heat on the stability and life of the battery. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What is the reason for the recycling of used batteries