Let us check out the structure and properties associated with solar "cells, " however, when combined into segments and arrays, the photo voltaic "cells" here are mechanically maintained other materials-aluminum, glass, as well as plastic.
One of the materials which solar cells can be made from is actually silicon-this is the material which you find inside integrated brake lines and transistors. There are reasons for using silicon; it does not take next most abundant component on earth after oxygen. Considering that sand is si dioxide (SiO2), you realize there is a lot of it out there!.Know more about Solar Power Electricity click here
Si can be used in several different ways to make photovoltaic cells. The most effective solar technology is that of "monocrystalline solar panels, " these are slices regarding silicon taken from a single, big silicon crystal. As it is just one crystal it has a very normal structure and no boundaries among crystal grains and so this performs very well. You can usually identity a monocrystalline solar power cell, as it appears to be circular or a square with curved corners.
One of the caveats with this particular type of method, as you will discover later, is that when a si crystal is "grown, inches it produces a round cross-section solar cell, which will not fit well with creating solar panels, as round tissues are hard to arrange effectively. The next type of solar cellular we will be looking at also produced from silicon, is slightly different, this is a "polycrystalline" solar cell. Polycrystalline cells are still made from strong silicon; however , the process utilized to produce the silicon that the cells are cut will be slightly different. This results in "square" solar cells. However , there are many "crystals" in a polycrystalline cell, so that they perform slightly less successfully, although they are cheaper to generate with less wastage.
Right now, the problem with silicon pv cells, as we will see in the next test, is that they are all effectively "batch produced" which means they are manufactured in small quantities, and are relatively expensive to manufacture. Additionally, as all of these cells tend to be formed from "slices" involving silicon, they use quite a lot of materials, which means they are quite expensive.
Today, there is another type of solar cells, alleged "thin-film" solar cells. The difference in between these and crystalline cellular material is that rather than using transparent silicon, these use substances to semiconduct. The chemicals are deposited on top of the "substrate, " that is to say basics for the solar cell. There are several formulations that do not need silicon at all, such as Copper mineral indium diselenide (CIS) and also cadmium telluride. However , additionally there is a process called "amorphous si, " where silicon is usually deposited on a substrate, while not in a uniform crystal framework, but as a thin film. Additionally , rather than being slow to provide, thin-film solar cells can be created using a continuous process, that makes them much cheaper.
However , drawback is that while they are less expensive, thin-film solar cells are less successful than their crystalline alternatives.
When looking at the merits connected with crystalline cells and thin-film cells, we can see that transparent cells produce the most energy for a given area. But the problem with them is that they are costly to produce and quite rigid (as you are limited to building panels from standard mobile sizes and cannot modify or vary their shape).
Efficiency of different cell kinds:
Cell material EfficiencyArea necessary to generate 1 KW top power
Monocrystalline silicon 15-18% 7-9 m2
polycrystalline si 13-16% 8-11 m2
Thin-film copper indium diselenide (CIS) 7. 5-9. 5% 11-13 m2
Cadmium telluride 6-9% 14-18 m2
Amorphous si 5-8% 16-20 m2
In comparison, thin-film cells are inexpensive to produce, and the only element limiting their shape will be the substrate they are mounted on. Which means that you can create large tissue, and cells of different size and shapes, all of which can be useful in certain programs.
We are now going to have a detailed look at making 2 different types of solar cell, 1 will be a crystalline solar cell phone, and the other a thin-film solar cell. Both of the actual experiments are designed to be "illustrative, " rather than to actually create shape is the substrate they may be mounted on. The technology needed to make silicon solar cells no longer has enough the reach of the home experimenter, so we are going to "illustrate" the how a solar cell is created, using things you can find within your kitchen. For thin-film photovoltaic cells, we are going to make an actual sun cell, which responds in order to light with changing electric properties; however , the effectiveness of our cell will be very bad, and it will not be able to generate a good amount of electricity.