US researchers say that nanotechnology can produce conductive inks, making it possible to print cheap and stable solar cells on clean surfaces.

Prof. Richard L. Brutchey, a chemist at the University of Southern California, said that nanocrystals are only 4 nanometers in size. A pin can hold 250 trillion nanometer crystals at the bottom of the pin. Nanocrystals can flow through liquid solutions, so it is like printing newspapers. Solar cells can also be printed.

Liquid nanocrystalline solar cells are cheaper to manufacture than single crystal cells, but the latter is not as effective in converting sunlight into electricity.

In the past, organic molecules were attached to the nanocrystals to keep the latter stable and prevent the latter from adhering to each other. However, organic molecules also caused crystal insulation and affected the conductivity of the crystal.

A report released by the University of Southern California on Wednesday states that Prof. Brutchey and postdoctoral researcher David H. Webber have developed a new surface covering nanocrystals. This not only results in good crystal stability, but in fact bridges the nanocrystals. Better transmission current.

According to the researchers, because this is a low-temperature process, solar cells made using this method can be printed on plastic surfaces without having to worry about melting, not necessarily on the surface of glass, so that they can be produced anywhere. Flexible solar panels.

Prof. Brutchey said that the commercialization of this technology will take several years, but they are very clear about the direction of future development in integrating this technology into next-generation solar cell technology. (Compilation: Bai Xiao)

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