A photovoltaic device comprising a photovoltaic cell is provided. The photovoltaic cell includes an emitter layer comprising a crystalline semiconductor material and a lightly doped crystalline substrate disposed adjacent the emitter layer. The lightly doped crystalline substrate and the emitter lay.....
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A process for two phase vacuum extraction of contaminants from the ground involves vacuum withdrawal of liquid and gaseous phases as a common stream, separation of the liquid and gaseous phases, and subsequent treatment of the separated liquid and gases to produce clean effluents. Two phase vacuum e.....
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This is the clearing technology that an object, such as parts or components, having oil substances thereon is cleaned efficiently with water. This technology can effectively prevent the removed oil substances from re-sticking to the surface of the object, after the oil substances is once removed fro.....
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