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Amorphous silicon (a-Si) is the non-crystalline form of silicon used for solar cells and thin-film transistors in LCDs.. Used as semiconductor material for a-Si solar cells, or thin-film silicon solar cells, it is deposited in thin films onto a variety of flexible substrates, such as glass, metal and plastic.
Gay-Lussac and Thénard are thought to have prepared impure amorphous silicon in 1811, through the heating of recently isolated potassium metal with silicon tetrafluoride, but they did not purify and characterize the product, nor identify it as a new element. [22] Silicon was given its present name in 1817 by Scottish chemist Thomas Thomson.
Crystalline silicon has a metallic luster and a grayish color. Single crystals can be grown with the Czochralski process. Crystalline silicon can be doped with elements such as boron, gallium, germanium, phosphorus or arsenic. Doped silicon is used in solid-state electronic devices, such as solar cells, rectifiers and computer chips. [1]
The Silicon Valley Archives [4] in the Stanford Libraries provides access to several collections related to the Silicon Genesis oral histories. [5] [6] These include the Rob Walker Papers, the Silicon Destiny collection of oral history cassette tapes, videos, and transcripts assembled for Rob Walker's book Silicon Destiny, [7] and the Silicon Genesis collection, [8] which includes physical ...
The New York Times reported this week that Thursday's Silicon Valley event is sold out, with attendees set to pay between $50,000 and $500,000 for tickets. Notable exceptions to past norms
Crystalline silicon or (c-Si) is the crystalline forms of silicon, either polycrystalline silicon (poly-Si, consisting of small crystals), or monocrystalline silicon (mono-Si, a continuous crystal). Crystalline silicon is the dominant semiconducting material used in photovoltaic technology for the production of solar cells .
Amorphous silicon (a-Si) is a popular solar cell material owing to its low cost and ease of production. Owing to its disordered structure (Urbach tail), its absorption extends to the energies below the band gap, resulting in a wide-range spectral response; however, it has a relatively low solar cell efficiency. Protocrystalline Si (pc-Si:H ...
The removal of impurities is usually done chemically. For example, in the manufacturing of iron, calcium carbonate is added to the blast furnaces to remove silicon dioxide from the iron ore. Zone refining, another purification method, is an economically important method for the purification of semiconductors. A basic distillation set up