These photons knock the electrons in silicon atoms and allow them to flow freely through the material. The motion of electrons, thus, generates electricity. The photons can either be absorbed or reflected from the surface of the solar cells, depending upon the energy present in them.
A solar panel is actually an assembly of solar cells mounted on a panel and covered by glass for protection. The procedure of constructing a solar panel involves the preparation of solar cells for assembling them together on the panel.
These cells are manufactured from silicon, and the two types that are used for this purpose are crystalline and amorphous silicon. Let us understand the making of solar panels with crystalline and amorphous silicon in the next paragraphs.
The dopant diffuses through the surface and contaminates the cells as per the requirement. A backing panel serves as a platform to arrange or assemble these contaminated solar cells. Metal strips which conduct electricity are fixed on the assembly of these cells and on their sunward face.
A glass layer fixed over the assembly of solar cells provide them with the necessary protection, and at the same time allows sunlight to pass through. In the process of constructing a solar panel, thermally conductive cement is used to attach it to the substrate.
The cement helps prevent the cells from overheating, however, being expensive, it increases the cost of the solar panel. It is necessary to keep the solar panel cool. It should thus be placed at an elevated position from the ground. Apart from the use of thermally conductive cement, this measure helps in keeping the solar panel cool.
Amorphous Solar Panel
Amorphous solar panels are made from silicon and doping materials which are sprayed together on a backing material. The backing material or platform used could be a metal one or manufactured from glass. In order to make these panels flexible, plastic could be used in the construction process.
The silicon layer used for these panels is thinner than crystalline wafers. The simplicity of the assembling process and the exclusion of expensive crystalline wafers reduces the manufacturing cost to a great extent.
This post presents before us the information regarding how solar panels are made, and a short description about how solar energy is produced. Solar panels thus, remain an effective, though slightly expensive way to produce electricity.