This week's unit has been about renewable energy, the type of energy we get from sources that can be replaced on a regular basis. Mostly, we are talking about the sun because the sun fuels the renewable sources, either directly or indirectly. For now, we'll talk about the direct ways, like passive or active solar heating.
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Watch the video and describe how a photovoltaic cell works.
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The solar cells that you see on calculators and satellites are also called photovoltaic (PV) cells, which as the name implies (photo meaning "light" and voltaic meaning "electricity"), convert sunlight directly into electricity. A module is a group of cells connected electrically and packaged into a frame (more commonly known as a solar panel), which can then be grouped into larger solar arrays,
Photovoltaic cells convert photons into electricity, by releasing electrons after absorbing Photons When these free electrons are captured, an electric current results that can be used as electricity.More then one solar cell electrically connected to each other is called a photovoltaic module. Multiple modules can be wired together to form an array. In general, the larger the area of a module or array, the more electricity that will be produced.
Photovoltaic cells use light (especially sun light) to make electricity. When light shines on the cell it moves the electrons from the positive side to the negative side. This movement becomes electric. Solar panels convert 10% of the sun's energy into electricity. Scientists are working on making solar panels that use 40% of the sun's energy.
A photovoltaic cell works when light shines on it, it picks up electrons to move from the negative terminal of the cell to the positive terminal of the cell this makes it work much like that of a battery.
Photovoltaic cells are little blue pads with a negative and positive charge on the front and back, that when in contact with sunlight, makes electricity. There's a grid of electrons that sometimes need is missing an arm and sometimes has one too many. This makes electricity.
Photovoltaic cell collect light from the sun, that is converted in to make electricity. What happens is the blue pad thing collects the light, then from one side to the other moves the electrons. So its very similar to how the battery works.
A solar panel is made of three parts. There is silicone, boron, and phosferus. The phosferus has an extra electron that if given enough energy will move. This creates electricity. The silicone will take the moving electron to the boron. In this way a solar panel is a lot like a battery. The phosferus is the negitive end and the boron is the positive end.
Photovoltaic cells are designed to make contact with the sun and produce power. their very similar to batteries, except Photovoltaic cells depend on electrons to pick up energy from the sun, and use it to move them selves. These solar cells are created using silicon crystals, which are very common. Other elements can be combined with silicon atoms, to create the negative and positive layers of the cell.
Well d-man, you see the solar cell is made from a Silicon sheet. In some places on this sheet Silicon atoms are replaced with Phosphorus and Boron. Phosphorus has a loosely attached extra electron witch when comes in contact with energy can move around. Boron on the other hand has one less electron which attracts energy. The Boron layers and Phosphorus layers are sandwiched together to create the electricity. Now with the hard part over I can explain the movement or transferable of energy. The metal frame aligning the front and back of the panel send energy out a wire at the bottom.
Photovoltaic cells use sunlight. They are composed of silicon, among other things. Electrons flow from the negative side to the positive side, and the positive side is the side covered with the shiny metal sheet. The sunlight causes the electrons to move. Though the force is different, it is very much like a battery, the way it works and everything. They are currently only able to convert 10% of the sunlight in to electricity. Scientists are now working on converting 40% of the energy in to electricity.
Photovoltaic cells take in light from the sun to create electricity. When light hits the surface of the solar panel the electrons pick up on the energy then they move to the negative side to the positive side of the cell.
Photovoltaic cells work when light is shinning on it is it picked up by electrons and the electrons convert into energy. Phosphorus if an electron in it picks up light in can move and transform into electricity. When light shines on the surface and is picked up by electrons. That energy is used to move from the negative port of the cell to the positive port. The blue side of the panel is the negative layer of the cell and the other side is positive.
A cool fact about the sun is that it gives 1000 watts of energy per sq meter. Solar panels use that fact to get electricity. The solar panels you see are really many, many, mini panels, because the mini panels by them self only produce 5 volts. The way the mini panels and the big panels work is they use silicon crystals (4 electrons). For the negative layer they add a phosphorus atom (5 electrons) to the silicon atoms the 5 electron has weak bond and if it meets electricity it is free to move about. That energy can come from anywhere but they use light for it. the positive layer however has a boron atom (3 electrons) instead of a phosphorus atom. The boron atom picks up the extra electrons. In a complete solar cell the positive and negative are together, which basically makes electricity.
The earth's tilt in the winter lesses the energy going onto horizontal but the sun's rays make thousands of watts of energy per second. Each square meter gets a power of a thousand watts, A LOT of power. Photovoltaic cells are a high-tech piece of equipment is designed to capture electricity with sunlight. Solar cells are quite similar to battery cells. When light is on the surface of the solar cell, the electrons in it pick up energy. Like a battery, the electrons move the energy from the negative side of the cell, pass a circuit and to the positive terminal. In order to make a solar cell, manufacturers use silicon crystals, a very common element. The silicon is connected to four pieces that are connected to others. Boron and other elements make the photovoltaic cell Phosphorus cells make the negative side of the photovoltaic cell, weakly bonding to the atom. When they pick up energy, they move to create electricity just from light.
The earth's tilt in the winter lesses the energy going onto horizontal but the sun's rays make thousands of watts of energy per second. Each square meter gets a power of a thousand watts, A LOT of power. Photovoltaic cells are a high-tech piece of equipment is designed to capture electricity with sunlight. Solar cells are quite similar to battery cells. When light is on the surface of the solar cell, the electrons in it pick up energy. Like a battery, the electrons move the energy from the negative side of the cell, pass a circuit and to the positive terminal. In order to make a solar cell, manufacturers use silicon crystals, a very common element. The silicon is connected to four pieces that are connected to others. Boron and other elements make the photovoltaic cell Phosphorus cells make the negative side of the photovoltaic cell, weakly bonding to the atom. When they pick up energy, they move to create electricity just from light.
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