The Earth intercept a lot of solar power a hundred and seventy-three thousand terawatts that’s ten thousand times more power than the planet population uses. So is it possible that one day the world could be completely dependent on solar energy . We first need to know how solar panels works convert solar energy to electrical energy solar panels are made up of smaller units called solar cells. The most common solar cells are made with Silicon semiconductor. . Crystalline silicon is sandwiched between conductive layers. Each silicon atom is connected to its neighbors by four strong bonds with keep the electrons in place. So no current can flow. Here’s the key a silicon solar cell uses two different layers of silicon and n-type silicon has extra electrons.
And p-type silicon has Extra Spaces for electrons called holes where the two types of silicon meet electrons can wander across the PN Junction leaving a positive charge on one side and creating negative charge on the other. When one of these Photon strikes the silicone cell with enough energy, it can knock an electron from its Bond leaving a whole the negatively charged electron and location of the positively charged are now free to move around but because of the electric field at the PN Junction, they’ll only go one way the electron is drawn to the ends side while the whole is drawn to the B-side the mobile electrons are collected by Thin metal fingers at the top of the cell from there. They flow through an external circuit doing trade like powering a light-weight .
Before returning through the conductive aluminum sheet on the rear each silicone cell only puts out half Vault, but you’ll string them together in modules to urge more power 12 photovoltaic cells are enough to charge a cell phone while it takes many module to power an entire house electrons are the only moving Parts in a solar cell and they all go back where they came from. There’s nothing to get worn out or used up so solar cell can last for decades.
There are political factors that play not to mention businesses that Lobby to maintain the status quo, but for now, let’s focus on the physical and logistical challenges in the most obvious of these is that solar power is unevenly distributed across the earth some areas are sunnier than others. It’s also inconsistent less solar power is out there on cloudy days or in the dark . So a complete Reliance would require efficient ways to urge electricity from Sunny spots to cloudy ones and effective storage of energy. The efficiency of the cell itself may be a challenge to if sunlight is reflected rather than absorbed or if dislodged electrons fall back to a hole before browsing the circuit that photons energy is lost the foremost efficient photovoltaic cell yet still only converts 46% of the available sunlight to electricity and most commercial systems are currently 15 to 20%
Bishop in spite of these limitations actually would be possible to power the entire world with today’s solar technology. We need the funding to create the infrastructure and an honest deal of space estimates range from tens to many thousands of square miles, which looks like a lot but the Sahara alone is over 3 million square miles in area. Meanwhile solar cells are getting better cheaper and are competing with electricity from the grid and Innovations, like floating solar farm may change the landscape in Tire late thought experiments. There’s the very fact that over a billion people do not have access to a reliable electric grid, especially in developing countries many of which are sunny.
So in places like that solar energy is already much cheaper and safer than available Alternatives like kerosene for Save INDIA Seattle though effective solar energy may still be a little way off.