Most single-layer silicon solar cells, due to their ability to use only a particular wavelength of light in the sun, have an efficiency limit of approximately 32% absorption and conversion from radiation, which is known as the "Hicks-Quiets limit." The MIT research team recently published a new solar thermophotovoltaic device (STPV) in the journal Nature Energy that dramatically improves energy conversion rates and reduces waste heat from power generation. Traditional solar cells can only convert certain wavelengths of sunlight in the sunlight into electricity and can not use the same portion of the heat at the same time and have watched them dissipate in the environment. The MIT research team's new solar cells contain an extra layer of nanotube nanotube structure made of nanophotonic crystal that absorbs both light and heat and converts it to light of a particular wavelength. These are precisely adjusted by the light, and then by the photovoltaic cells into electricity, effectively improve power generation efficiency. In theory, this new technology can double the amount of electricity generated by a given block of solar panels, but due to the manufacturing difficulties of carbon nanotubes and their inability to rapidly spread within a few years, the team found the results to be significant: This is the latest record of what we know about solar thermal photovoltaics, and there is a good chance of being actually used in the industry. " A NEW SOLAR CELL CONVERTS THE SUN'S HEAT INTO USABLE ENERGY Hot new solar cell (This article is authorized by PanX; Image Source: MIT Research Unit)
The role of the brightener is to convert the invisible ultraviolet radiation absorbed by the product into purple-blue fluorescent radiation, which complements the original yellow radiation to become white light, and improves the whiteness of the product under sunlight. Brighteners have been widely used in textiles, papermaking, washing powder, soap, rubber, plastics, pigments and paints.
Generally, brighteners are divided into two categories, one is water-soluble brighteners, and the other is water-insoluble brighteners. The former can be used as a brightener for paper, paint, washing powder and cotton fabrics. The latter can be used for whitening of chemical fibers and plastics.
It is often divided into:
This product is especially used for the molding and processing of various plastics and plastic products under high temperature. Because of its good heat resistance, light resistance and chlorine resistance, it is a brightener for polyester fibers. Polyester, cotton and other fiber blended fabrics The whitening effect is also particularly ideal, and can be used for the whitening of polyester stock solution.
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Fluorescent brightener for detergents; Fluorescent brighteners for textiles; Fluorescent brighteners for papermaking; Fluorescent brighteners for plastics and synthetic materials; Fluorescent brighteners for other purposes.
January 23, 2024