Photovoltaic Cells - What Are They And What Are

by:Longsun     2020-05-17
We often see solar cells in everyday life; when we drive the car and accidentally pay attention to an emergency road sign placed across the street, when we use a calculator that seems to work forever even though we do not put any batteries in it, and when we spot some large solar panels outside the city. Solar cells take advantage of the unlimited supply of sunlight, which reaches the Earth every second. They are easily found, and it has indeed become a part of human's life. However, most people do not completely understand how solar cells work. The solar cells that we find on the road signs, domestic houses and calculators are photovoltaic cells or as they are commonly called PV cells. The word photovoltaic itself is originated from the Greek language, which means light and electricity. Therefore, it can be understood that a photovoltaic cell transforms solar light, and indeed any form of light, into electricity. A large group of solar cells connected to each other forms a photovoltaic module. Each cell functions as a semiconductor which captures solar light. It is made of two layers of silicon; the positive type or P-type and the negative type or N-type. Both P-type and N-type silicon create an electric field that will capture photons released by the solar light. These photons are absorbed into the cells through the N-type silicon. When photons reach the P-type silicon, they release their energy-called electrons. The free electrons later return to the N-type silicon and flow through the connecting wire. These flowing electrons are what we call electricity. The direct current (DC) can be changed to AC through an inverter so the electricity can be used to power lights, motors or other loads. Combined solar cells into photovoltaic panels produce electricity that can be used for specific functions, such as calculators, road signs and water heating. Photovoltaic panels can also be installed in domestic houses easily. Because the amount of solar light differs from one area to another, the amount of solar energy received in every area is different as well. Areas with lots of sunny weather receive a huge amount of solar energy, especially when the array is designed and angled to capture the most sunlight. On the other hand, a cloudy area receives only a little amount of solar energy. Nevertheless, this area can still produce enough amount of solar energy to power a home entirely. A home merely needs around eight kilowatt/m2 of solar energy or equals to 10 m2 of solar panels. Basically, covering a standard roof with a photovoltaic array would produce enough energy for that homes consumption. Photovoltaic panels are indeed a great source for energy savings that can be implemented in everyday life. Solar light is free and environment friendly. By using photovoltaic panels in domestic houses, people can both cut their electricity bills and decrease the amount of pollution caused by carbon dioxide (CO2) emissions. A fact you might consider interesting is that if it were possible to cover the uninhabited area of the Sahara Desert in solar panels, the resulting energy produced would be nearly 47 times what the entire earth uses at any given moment!
Service-based companies as LONGSUN SOLARELECTRIC CO.,LTD are increasingly becoming more popular internationally.
Our mission is to operate the best specialty retail business in domestic, regardless of the product we sell. Because the product we sell is solar panel, our aspirations must be consistent with the promise and the ideals of the volumes which line our manufacture.
LONGSUN SOLARELECTRIC CO.,LTD’s model also predicts (i) a positive effect of management on firm performance; (ii) a positive relationship between product market competition and average management quality (part of which stems from the larger covariance between management with firm size as competition strengthens); and (iii) a rise (fall) in the level (dispersion) of management with firm age.
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