crystalline silicon


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Related to crystalline silicon: Amorphous silicon

crystalline silicon

Silicon that has an ordered atomic structure. It is used in almost all integrated circuits in the electronics industry. Fabricated from quartzite, a pure form of sand, the quartzite is treated (see below) to create polycrystalline silicon (polysilicon), a very pure silicon with multiple single-crystal regions of different sizes and orientations. The polysilicon is used to "grow" a single-crystal (monocrystalline) ingot that is sliced into wafers.

From Quartzite to Polysilicon
A common method of creating polysilicon is to mix quartzite with carbon materials in order to produce a very pure silicon that is then exposed to hydrogen chloride. This yields trichlorosilane, which is decomposed by an electric current in a chamber. The result is rods of polycrystalline silicon, which become the raw material for the crystal pulling process that creates the ingots. Contrast with amorphous silicon. See polysilicon.
References in periodicals archive ?
AccuStrata Inc., a company based at the University of Maryland Research Park, has signed a contract to enhance performance and yields for a large crystalline silicon solar cell manufacturer in India, PR Newswire has reported, citing company officials.
According to the two entities, this is a world record for p-type silicon and a European record for crystalline silicon.
Sino-American is currently Taiwan's No.2 supplier of crystalline silicon wafers, turning out 1.2 gigawatts of the materials a year.
As the inset diagram shows, the roughly1-micron defect results from a three-dimensional deformation of the lattice structure of crystalline silicon. The butterfly pattern emerges only when the deformation is viewed at one of several select angles.
The company's patented crystalline silicon technology, known as String Ribbon, uses significantly less silicon than conventional approaches.
Metallurgical engineer William Clark and his colleagues start the process by welding together two thin slices of crystalline silicon. If the evenly spaced rows of atoms in the two slices are aligned precisely, then the crystals bond perfectly and the boundary disappears.
The United States International Trade Commission (USITC) today announced the remedy recommendations that it will forward to the President in its global safeguard investigation regarding imports of crystalline silicon photovoltaic cells (whether or not partially or fully assembled into other products).
Shun Feng Photovoltaic International Ltd, a new high-tech enterprise integrating the R&D, manufacturing, sale and technical service of crystalline silicon solar cell and wafer, is planning to raise USD100m, to USD200m, Dow Jones has reported, citing a source familiar with the situation.
recently announced it will furnish a factory in Taipei County with production lines for turn out crystalline silicon ingots enough for making 300 megawatts of solar cells, its photovoltaic subsidiary Green Energy Technology Inc.
The PV industry has been experiencing a shortage of electronic-grade silicon used in the crystalline silicon PV modules, which has led crystalline silicon PV module suppliers to initiate work in thin film-based photovoltaic materials not affected by the silicon material shortage.
JIANGSU Sunpower Pressure Vessels Equipment Manufacturing, an arm of mainboard-listed Sunpower Group, announced that it has been offered a 94.8 million yuan contract by Inner Mongolia Tongwei High-Purity Crystalline Silicon Co.
Specializing in crystalline silicon wafers for semiconductor chips and solar cells, Sino-America plans to compete for contracts from the Texas State Government for over 10 megawatts of modules through its Texas affiliate Globitech Inc.