There are numerous of numerous technologies which can be used to create devices which convert light into electricity, and we are gonna explore these therefore. There is always a balance being struck between how well something works, and just how much it costs to generate, as well as the same can probably be said for solar panel technology.
We take cells, and that we combine them into larger units referred to as “modules,” these modules,” these modules can again link together to create arrays. Thus we can easily note that you will find there’s hierarchy, the place that the solar panel will be the smallest part.
Why don’t we check out the structure and properties of solar “cells,” having said that, when combined into modules and arrays, the solar “cells” allow me to share mechanically based on other materials-aluminum, glass, and plastic.
One of several materials that cells can be made from is silicon-this is the material that you find inside integrated circuits and transistors. You will find explanations for implementing silicon; it’s the next most abundant element on earth after oxygen. When you consider that sand is silicon dioxide (SiO2), you realize that there’s a lot than it available!
Silicon can be used in numerous new ways to produce pv cells. The best solar technology is “monocrystalline solar cells,” these are generally slices of silicon taken from just one, large silicon crystal. Because it is a single crystal it has a very regular structure with no boundaries between crystal grains so it performs very well. You can generally identity a monocrystalline solar panel, because it appears to be round or even a square with rounded corners.
One of several caveats using this kind of method, as you will see later, is every time a silicon crystal is “grown,” it produces a round cross-section solar panel, which doesn’t fit well with making solar panels, as round cells are hard to prepare efficiently. The subsequent sort of solar panel we will be taking a look at also produced from silicon, is slightly different, this is a “polycrystalline” solar panel. Polycrystalline cells continue to be made out of solid silicon; however, the method employed to make the silicon from which the cells are cut is slightly different. This leads to “square” cells. However, there are several “crystals” within a polycrystalline cell, so that they perform slightly less efficiently, although they are less expensive to make with less wastage.
Now, the challenge with silicon cells, once we will see within the next experiment, is that they are all effectively “batch produced” which suggests they’re produced in small quantities, and therefore are fairly harmful for manufacture. Also, as many of these cells are formed from “slices” of silicon, they will use a lot of material, this means they may be pricey.
Now, there is certainly another type of solar panels, so-called “thin-film” solar cells. The real difference between these and crystalline cells is always that as an alternative to using crystalline silicon, these use compounds to semiconduct. Mit compounds are deposited in addition to a “substrate,” frankly a base to the solar cell. There are many formulations that don’t require silicon in any way, including Copper indium diselenide (CIS) and cadmium telluride. However, there is also a process called “amorphous silicon,” where silicon is deposited on a substrate, although not inside a uniform crystal structure, but as a thin film. Additionally, as an alternative to being slow to produce, thin-film solar panels can be done using a continuous process, which makes them a lot less expensive.
However, the disadvantage is that when they are cheaper, thin-film solar panels are less efficient than their crystalline counterparts.
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