aluminum panels Solar Cell Technologies

by:Carlos     2019-04-09
There are many different technologies that can be used to produce equipment that converts light into electricity,We will explore these in turn.There is always a balance to determine how good things work,And how much cost to produce,The same is true for solar energy.We use solar cells.We combine them into larger units called modules""These modules,"These modules can be connected together again to form an array.So we can see that there is a hierarchy,The solar cell is the smallest part.Let's look at the structure and performance of solar cells,But remember,When combined into modules and arrays,The solar energy here, the "battery", is mechanically supported by other materials-aluminum,glass,and plastic.One of the materials that solar cells can be made of silicon-This is the material you find within the integrated circuits and transistors.There are good reasons for using silicon;It is the next most abundant element on Earth after oxygen.When you think the sand is silica (SiO2),You know there's a lot out there!Silicon can produce photovoltaic cells in several different ways.The most effective solar technology is "single crystal silicon solar cell""These are monolithic wafers,Large silicon crystal.Since it is a single crystal, it has a very regular structure and there is no boundary between the crystal grains, so it performs well.You can usually identify a single crystal silicon solar cell.Because it seems to be a round or rounded square.A warning for this method isAs you will see later,Is when a silicon crystal, "grow up""It creates a round cross-Solar cells,This is not appropriate for making solar panels,Because round cells are difficult to arrange effectively.The next type of solar cell we will be working on is also made of silicon,Slightly different,This is a "polycrystal" solar cell.Polycrystal cells are still made of solid silicon;however,In the process of producing silicon, the cutting of cells is slightly different.This leads to, "square", solar cells.However,There are many "crystals" in polycrystal cells ",So their performance is slightly less efficient,Although they are less wasteful of cheap production.Now,Problems with silicon solar cellsAs we can see in our next experimentIs that they are all effective, "mass production", which means that they are small batch productionAnd the cost of manufacturing is quite high.Also,Since all these cells are made of silicon, "sliced ",They used a lot of materials.This means they are quite expensive.Now,There's another type of solar cell.so-called "thin-Thin film solar cells.The difference between these cells and crystal cells is that instead of using crystalline silicon,These use chemical compounds to semiconductors.Chemical compounds deposited at the top of the "substrate""That is the basis of solar cells.There are some recipes that don't need Silicon at all,For example, copper in two selenium (CIS)And cadmium chloride.However,There is also a process called "amorphous silicon""Where silicon is deposited on the substrate,Although the crystal structure is uneven,But as film.In addition,Rather than slow production,thin-Thin film solar cells can be generated using continuous processes,This makes them much cheaper.However,The downside is that they are cheaper.thin-Thin film solar cells are less efficient than Crystal cells.When looking at the advantages of crystal cells and thin-film cells,We can see that the crystal cells produce a given region with the greatest power.However,Their problem is that they are expensive to produce and are rather inflexible (Since you are limited to building a panel from a standard cell size and cannot change or change its shape).Efficiency of different cell types:Single crystal silicon 15-18% 7-Polysilicon 13-16% 8-Thin-Thin film copper, tin, two selenium compounds (CIS)7.5-9.5% 11-Cadmium chloride 6-9% 14-Amorphous silicon 5-8% 16-By contrast,thin-Thin film cells are cheap,The only factor limiting their shape is that they are mounted on the substrate.That means you can create big cells,And cells of different shapes and sizesAll of this can be useful in some applications.We're going to look at two different types of solar cells in detail now,One will be a crystal solar cell,And the other thin-Thin film solar cells.Both experiments were designed as "illustrative""Instead of actually making the shape is that they are mounted on the substrate.The technology needed to make silicon solar cells is beyond the scope of home experimenters,So we need to "explain" how solar cells are made?Use what you can find in your kitchen.For thin-Thin film solar cells,We're going to make a real solar cell.The response to light changes with the change of electrical performance;however,Our cells will be very inefficient.It will not produce useful electrical power.
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