solar energy system

The first practical photovoltaic cell was developed in 1954 at Bell Laboratories .They used a diffused silicon p–n junction that reached 6% efficiency, compared to the selenium cells in fabrication of solar cell. Most practical solar cells are silicon based ,because it is cheap and abundant material. STEPS of fabrication of solar cell First step …

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below we will discuss how monocrystalline and multicrystalline silicon wafers can be produced. In the Figure we illustrate the production process of onocrystalline silicon wafers. The lowest quality of silicon is the so-called metallurgical silicon, which is made from quartzite. Quartzite is a rock consisting of almost pure silicon dioxide (SiO2). For producing silicon the …

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