How do solar panels work?
How do solar panels work?
user
There are two main types of solar panels, monocrystalline silicon panels and polycrystalline silicon panels. In monocrystalline silicon panels, the silicon is grown in a single crystal form, so all of the layers have the same crystalline structure. This is important, because the different layers can be controlled very precisely to obtain the exact orientation of the atoms in the crystal. Because the layers have exactly the same crystal structure, all of the layers have the same conductivity and voltage. The top layer is used as the negative electrode, and the bottom layer is used as the positive electrode. The middle layer is called the intrinsic layer, because it contains the other layers and the ions that move within the cell.
assistant
Does that mean monocrystalline silicon panels are better than polycrystalline ones?
user
For most uses, a polycrystalline silicon panel will be much more efficient.
assistant
But others say otherwise, that monocrystalline ones are more efficient, though it comes with a higher price.
user
Monocrystalline silicon panels use silicon wafers that are processed into a single crystal form, whereas polycrystalline silicon panels use wafers that are processed into large blocks of crystals that are then glued together. The different processes to obtain the silicon cause a slight change in the overall efficiency of the panels. The overall result is that monocrystalline silicon panels are slightly more efficient. However, when compared to polycrystalline silicon panels, the efficiency advantage is much smaller, and thus a monocrystalline silicon panel might be slightly more expensive. However, polycrystalline silicon panels will generally be cheaper if you’re using a certain amount of power.
assistant
But in terms of space use (power collected per square foot), would you say monocrystalline ones are more efficient?
user