The fill factor of silicon photovoltaic cells is generally between 60 and 85%.
The fill factor, FF, is a measure of the quality of the solar cells (series resistance and parallel resistance). Fill factor FF is defined as the actual maximum output power divided by the ideal target output power (Isc×Voc)
The above formula only applies to ideal situations, it is i.e. when there is no loss of parasitic resistance. . Values can be precise to four digits.
It follows from equation (7.10) that FF is a measure of the maximum power surface contained in the characteristic curve I? V of the solar cell relative to the rectangular surface (ideal shape) corresponding to open and short cells. circuits. It is clear that FF should be as close to 1 (i.e. 100%) as possible, but the p-n junction properties of the functionexponential prevent it from reaching 1. The larger the FF, the higher the quality of the solar cell. The typical value of FF is usually 60-85% and is determined by the material and structure of the solar cell device.
The common electrical performance parameters of solar cells are mainly as follows:
1. Open circuit voltage Voc
2. Short circuit current Isc
.3. Maximum power point voltage Vmpp
4. Maximum power point current Impp
5. Fill factor FF≈ (Impp/Isc)*(Vmpp/Voc)
6. The maximum power of the Pmpp
7 module. The conversion efficiency of the module
8. curve) of the photovoltaic module
9. PV characteristics of photovoltaic modules
The peak power you are talking about is element 6, that is Pmpp
Peak The power is equal to the maximum voltage of the power point and at the maximum current of the p pointpower. The product of , is the value obtained under standard conditions (STC)
The maximum power point voltage and the maximum power point current of solar cells under different conditions lighting and temperatures will be different
But one thing remains unchanged, that is, the maximum power point power is the product of the maximum power point maximum power point voltage and current under current conditions