How does a solar cell generate electricity?

Electric power generation that we know or are familiar with. It is the nature of the movement of the generator or Generator, which makes understanding the production process. Focus on how to do or what energy will be used. 

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In order to send power to the generator to rotate and produce energy, such as a turbine in a large dam or large wind turbine Or even a normal bike with a small electric generator that receives power from the rubber wheels while we spin. can send electricity to the bulb and light it up etc.

But for this solar cell It doesn’t need any energy to drive electric power generation. Thus making the production of electricity from the solar cell system It is currently the number one alternative energy source. because it can produce electric power by itself without needing to rely on energy from other sources besides the sun There are also byproducts of light other than that of the sun.

The working principle of solar cells starts from the sunlight, no matter how bright or dim. Shines on the solar panel When will it be created? The carriers or drivers carry the negative (-) electric current called “electrons” and the positive (+) electric current called “holes” within the PN junction (P-N) structure of the semi-substance. Conductor (Semiconductor) by this junction PN structure. will serve to create an electric field within the cell to separate the power carriers electrons to flow to the negative (-) terminal and the hole-type carrier to flow to the positive (+) terminal, thereby causing a voltage in the direct current (VDC) system at both charge terminals. When we supply the voltage from the solar cell Log in to our electrical appliances such as light bulbs. Pumps and other electrical equipment We will need to use a rectifier. Or an inverter (Inverter) or  micro inverter from a direct current system (VDC) to an alternating current (VAC) system so that the electric current is the same as the electric current system of the appliance and normal equipment

Types of solar cells or PV made from semiconductors. (Semiconductor) such as silicon, both crystalline and amorphous. Or types produced from other compounds already. Now we are going to get to know and understand the properties of specific semiconductors made from silicon. Because such materials have the ability to produce energy. This type of electricity is widely used and easy to find. And the price is suitable for a production process of renewable energy. It is also a good choice. Like that, here we will talk about solar cells. or in other words There are three types of “solar cells”:

1. Single Crystalline Silicon Solar Cell (c-Si)

Silicon is one of the most abundant elements on Earth. It is the cheapest semiconductor material. which can be smelted from stone and sand generally used in Silicon in the electrical and electronic industry, for example, used to produce medical equipment Electronics such as transistors, ICs or solar cells, etc. For this C-Si technology has been widely used. It has also been applied to many applications in the production of energy from the sun. For our country The popularity of such materials is in rural areas. Especially in areas where the electrical system has not yet been able to expand into the main area.

2. Crystalline polysilicon solar cells (Polycrystalline Silicon Solar Cell or pc-Si)

The material was developed from this single-crystal silicon. Caused by efforts to reduce the production cost of C-Si, resulting in the development of pc-Si technology with the aim of reducing the production cost of pc-Si to be lower than C-Si as much as possible. This is considered to accelerate the production of the renewable energy parts industry. progress due to lower cost As a result, investors are more interested in the energy business as well. It also has a positive effect on general electricity users who want to have more options than the existing ones. It was a success in trying to achieve the goal. The pc-Si technology was rapidly gaining popularity until now.

3. Amorphous Silicon Solar Cell (a-Si)

for amorphous silicon It is another technology that uses silicon to produce solar cells. But no crystalline nature, which is the effect of amorphous substances, will form a thin film of silicon and is approximately 300 nanometers thin. In addition to not wasting material, it is also lightweight. It has a simple production process and does not pollute the environment. Therefore, it is suitable to be applied to electrical devices that do not require large amounts of energy such as calculators, wristwatches, transistor radios, etc.

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