Solar Panels Information



We do not know why we waste our time in digging oil and coal when there is a huge power station in the sky which is above us, where free and non-stop energy is available for free. Sun is one of the largest sources of nuclear energy that can provide enough fuel to run our solar system and run for 5 billion years - and solar panels can turn this energy into an endless, convenient power supply.

Many people get solar-powered lighting in their garden. Space panels and satellites are usually mounted on solar panels, and the American space agency NASA has also developed a solar-powered plane.

As global warming is threatening our environment, there is no doubt that solar energy will become an even more important form of renewable energy in the future.

 How much energy can we get from the sun?


Solar energy is amazing and on average, every square meter of the Earth's surface receives 164 watts of solar energy. In other words, you can stand a powerful (150 watts) table lamps on every square meter of the Earth's surface and can light the entire planet with the energy of the sun or if we Sahara with solar panels only cover one percent of the desert, then we can generate enough power to make the whole world electricity.

But there is also a negative side that the Sun sends energy to the earth as a mixture of light and heat. Both of these are incredibly important- the lights allow plants to grow, provide food to us, while the heat keeps us warm enough to survive - but we can use direct sunlight or heat to run any TV or car Can not use, we have to find a way to convert solar energy into other forms of energy, which we can use more easily, such as Ijli, and they are all working solar cells (Solar cells).

What are solar cells?
The solar cell is an electronic device that makes electricity from sunlight. Solar cells are often called solar modules and small solar cells bundled together to make large solar panels (which you see on people's houses - usually on the roof).

The battery is made to make electricity from the solar panel and to collect its energy, which we keep for our use.

Solar cells are also called photovoltaic cells, the word kuke is derived from the Greek language, which means light.

The sun's light is made of very small photons, which shines in the sun's light. If you bring one of the solar cells in the sun's light then it will convert this light into the stream of electrons, it is called the widow flow.

Each cell generates some voltage of electricity, so the work of a solar panel is to combine the energy produced by many cells, which increases the amount of useful electrical current and voltage.

Today all of the solar cells are made of silicon slices (one of the most common chemical elements on the earth, is found in the sand), although as we will see shortly, many other materials used (or instead) can go. When the sunlight lights on a solar cell, the energy explode outside of silicon. They can be forced to flow around the electric circuit and anything that moves on electricity.

 How are solar cells made?


Silicon is neither a conductor nor an insulator: it is a semiconductor that usually does not take electricity, but in certain circumstances, we can do it. The solar cell is a sandwich of two different layers of silicon, which is specially doped so that they can give electricity through them in a special way.

The lower layer is covered, so there is a little electron in it, it is called P-Type or Positive-type silicon. Doping in the opposite direction to give the upper layer a bit more electrons, it is called the N-type or negative-type silicon.

When we put an N-type silicon layer on the layer of P-type silicon, then a layer becomes called a junction. No electron can cross this junction, even if we do not apply any voltage to this silicon sandwich.

But if we put light on silicon, then the photons enter the junction of silicon, and they release their energy in silicon. Energy electrons open out of the lower, P-type layer, so they jump over the N-type layer from the top and flow around the circuit.

As we put more light on silicon, the more photons leave their energy inside them and the flow of the electrons increases, which leads to excessive flow.

Solar Panels Information



How does solar cell work?
A solar cell is a sandwich of N-type silicon and P-type silicon. It generates electricity by using sunlight to make the electrons' hop on different junctions of silicon.
  • When the sun's light shines on the cell, then the photon (light particles) shower on the upper surface.
  • Photons reduce their energy through the cell.
  • In the photon p-type layer, the electrons leave their energy.
  • Electrons use this energy to fill the junction in upper, n-type layers and exit in the circuit.
  • Flowing around the circuit, the electron lights the lamp.
What about solar farms?
Suppose we really want to make large amounts of solar power, so to generate more power in the form of a heavy wind turbine (maybe with two or three megawatts of extreme power generation), you have about 500-1000 solar roofs To compete with and to compete with a large coal or nuclear power plant, you will need 1000 times more again - equivalent to almost 2000 wind turbines or perhaps ten million solar cells. Of issues.

The UK's renewable company Ecotricity estimates that a large amount of electricity can be prepared in 21 hectares (30 acres) of 21,846 panels with 4.2 MW electricity, about two big wind turbines and 1,200 households.

Some people are concerned that if solar panels are installed in the solar fields then the land for food production will come from the ground, it is also right.

If we put a solar panel on the house roof of all the people, then maybe we will not even need the land of farming for solar energy, it is an ego issue in itself.

Environmentalists argue that the real issue of solar energy is not to build large, centralized solar power stations, but to encourage the people by allowing centralized power plants, from which they themselves own solar panels to use their homes Could generate electricity from solar energy

A brief history of solar cells


  1. 1839: French physicist Alexander-Edmund Beckell discovered that some metals are photoelectric: they generate electricity when exposed to light.
  2. 1873: English engineer Willful Smith discovered that Selenium is a particularly effective photoconductor (later it was used by Chester Carlson in his invention of the photocopier).
  3. 1905: German-born physicist Albert Einstein discovered the physics of photoelectric effect, which eventually earned him Nobel Prize.
  4. 1916: American physicist Robert Millikan proved Einstein & # 39; s theory experimental.
  5. 1954: Bell Labs researcher Daryl Chapin, Kelvin Fuller, and Gerald Pearson created the first practical photovoltaic silicon solar cell.
  6. 2002: NASA launches its Pathfinder Plus solar plane.
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