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https://www.blogger.com/blog/post/edit/7861588087600495040/6967505697347513583 ow that we're two-thirds of the way through 2020 we thought it was about time to make a video about the future until recently they used to make science fiction movies about the year we are in movies with robots and flying cars okay they didn't predict coronavirus but anyway we figured you've had enough of hearing about the coronavirus right now so we thought we'd stick to the robots and other mind-blowing technologies that or about to change it welcome to the place where future billionaires come if you're not subscribed yet you're yep we promised we'd give you robots and the robots we're talking about don't look like the ones from star wars lots of them like alexa and siri you see because they're a computer program what makes them robots is the fact they analyze it and learn from it and keep on or the ones on google and facebook that figure out what ads they should make pop and for when you actually leave your living room robots are already helping act as virtual nurses for patients in the future we could be talking about that will be able to cook for us do all and outside of our houses doing dangerous ones like fighting fires or and a whole load of other things we'll that's because ai is already combining every recent technology and it's only number two brain computer interfaces imagine being able to control a computer or a drone with not a set of controls or hearing music not from speakers but straight into your brain maybe that thought blows your mind or perhaps it either way it's already being developed and leading the way is elon musk's which is looking

https://www.youtube.com/watch?v=jp1e-ECUAdo Over the past two decades, the contribution of solar energy in this video shows how solar cells or photovoltaic cells produce energy from the sun in the most abundant and absolutely free way. To harness this energy, we need the help of the second largest sand to convert it into 99.999% pure silicon crystals, which requires the sand to go through a complicated refining process. Crude silicon is converted into gaseous silicon compounds. Then it is mixed with hydrogen to get high purity. These silicon blocks are reformatted and converted into very thin slices called silicon wafers. If we analyze the atomic structure of silicon, you can see that when you bond with someone, you lose your freedom. Similarly, the electrons in the silicon structure are also unnecessary. To simplify the investigation, consider the 2d structure. Let's assume that the phosphorus atom with five valence electrons here is one free electron. If the electrons in this structure get enough energy, let's try to build a very simple solar cell using just that. When light hits them, electrons acquire photon energy, and the movement of these electrons is random. Not. To create a unidirectional flow of electrons is a driving force A simple and practical way to create a driving force is PN. Let's see how the PN junction creates the driving force. Similar to n-type doping when you inject trivalent boron. When these two types of alloying materials are joined together, some electrons migrate from the N side to the P region and thus a depleted region is formed where none is free due to electron migration, the N side boundary becomes lightened and the P side becomes negatively charged. After all, an electric field was formed between them. This electric field produces the necessary driving force. When the light hits the PN junction, something very interesting. The light hits the N region of the photovoltaic cell and penetrates. The energy of this photon is sufficient to create an electron-hole pair. The electric field in the depletion region moves the electrons. Here we observe that the concentration of electrons in the N becomes so high that there is a potential difference between these regions, as soon as we connect the charges between these regions, the electrons will recombine with the holes in the P region after the solar cell continues directly. at the moment. In practical solar cells, it is seen that the top N-layer is very thick, while the P-layer is thick and lightly doped. It is intended to improve cell performance. Just look at the fatigue region form here. Note that the thickness of the depletion zone is very large. This means that more electricity is generated by the photovoltaic cell when the light hits the electron-hole pairs. Another advantage is that more light enters due to the thin top layer. Now let's analyze the structure of the solar panels. You can see that one of them is a layer of cells. You will be amazed at how the electrons collect as they pass through your fingers. The top negative side of this cell is connected to the back. Here it forms a sequential relationship. If you connect these series-connected cells in parallel, one photovoltaic cell only produces about 0.5 volts. This combination increases the current and voltage values ​​to a usable range. A layer of EVA film on both sides of the cell serves to protect from the sun. This is due to the difference in the inner crystal. In polycrystalline solar panels, the multi-crystals are random. Although the chemical process of crystalline silicon has the same working principle, monocrystalline cells are more expensive and therefore not widely used. The operational costs of photovoltaic cells are negligible. The total global energy contribution from solar energy is only 1.3. This is mainly due to the capital costs and efficiencies unmatched by conventional power options. However, the solar panels on the roof of the house have the ability to store large amounts in the case of solar power generation. Therefore, they are usually connected to the mains. With the help of an inverter, direct current is converted into alternating current and supplied with electricity. Please support and don't forget to support the Learn Engineering educational activity on patreon.com