Analysis of the basic characteristics of solar cells

The basic characteristics of solar cells have 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. Detailed explanations are as follows: 1. Polar silicon solar cells of 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 conductivity type of the semiconductor material on the backside of the solar cell. The electrical properties of solar cells are related to the characteristics of the semiconductor materials used to manufacture the 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, fill factor, conversion efficiency, etc. These parameters are indicators of the performance of solar cells. 3 The volt-ampere characteristics of the solar cell The PN junction solar cell group includes a shallow PN junction formed on the surface, a strip and finger-shaped front ohmic contact, a back ohmic contact covering the entire back surface, and a layer of anti-reflection on the front Floor. 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.