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Plans types et devis des infrastructures (en)

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  • tom lee

    tom lee

    20 October 2022 | Comment Link

    The basic characteristics of batteries for solar panels include the polarity of solar cells, the performance parameters of solar cells, and the volt ampere characteristics of solar electric environment-friendly batteries. 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+, which represent the conductive type of semiconductor material of the front lighting layer of the solar cell; N and P, indicating the conductive type of the semiconductor material of the back substrate of the solar cell. The electrical performance of solar cells is related to the characteristics of the semiconductor materials used in the manufacture of solar cells.

    2. Performance parameters of solar cells

    The performance parameters of solar cells consist of open circuit voltage, short circuit current, maximum output power, filling factor, conversion efficiency, etc. These parameters are the 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 like and finger like 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 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, while those with 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 impact of this heat on the stability and life of the battery.

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