Polysilicon

   Polysilicon is the starting material for crystalline solar cells and most of the electronic industry. The cost of the end products like mono and multi crystalline solar cells are largely dependent upon its availability and pricing. Polysilicon which is just a highly purified form of silicon is derived from silica sand and quartz. In Earth's crust, silicon is the second most abundant element after oxygen, making up 25.7% of the crust by mass. 

  Today, silicon is purified by converting it to a silicon compound that can be more easily purified by distillation than in its original state, and then converting that silicon compound back into pure silicon. Trichlorosilane is the silicon compound most commonly used as the intermediate, although silicon tetrachloride and silane are also used. When these gases are blown over silicon at high temperature, they decompose to high-purity silicon. In the Siemens process, high-purity silicon rods are exposed to trichlorosilane at 1150 °C. The trichlorosilane gas decomposes and deposits additional silicon onto the rods, enlarging them

  Silicon produced from this and similar processes is called polycrystalline silicon. Polycrystalline silicon typically has impurity levels of less than 10−9.

In 2006 REC announced construction of a plant based on fluidized bed technology using silane.

   Energy Control Systems has associations with key polysilicon producers and integrators. Because of the quantum of project involved, we offer complete turnkey solution starting from feasibility study to short listing of machinery and companies based on the latest technologies to optimize maximum revenue generation. We assist in site selection, financial modeling, local indigenization, envoirmental threat assessment, carbon trading for the project, project management help and selection of best companies for project execution. Please consult us for your initial feasibility studies.