It is said that there is a solvent, which is just like the baking powder in the bread making process, which can fully exert the effect of the original product. If it is properly added during the manufacturing process of the organic thin film solar cell, the efficiency of the battery will increase to 2 times or 3 times ( This is the same thing as "oil tyrants.")
In the past ten years, nobody knows the principle of improving efficiency. But now researchers from TU/e ​​have discovered the secret to efficiency: if the solvent is not added, large droplets form during the hardening of the plastic mixture (film material), adversely affecting the electron transfer, and eventually affecting the solar cells. The conversion efficiency. The solvent acts like a "flour" and enhances the structure of the plastic mixture.
The results of this study have provided a good inspiration for the development of organic thin-film solar cells. The relevant results were published in the journal Nature Communications.
[Extended reading]
At present, there are three generations of solar cell materials in the world. The first generation is crystalline silicon solar cell materials, including monocrystalline silicon and polysilicon (trio is currently common on the market). The conversion rate is good but the process is complicated and the price is high. The second generation is an inorganic thin film solar cell material. However, less rare earths are used in thin-film materials, and one type of rare earth indium is very scarce.
So this third generation is organic thin-film solar cell material, it is very cost-effective. The film material production process is simple and energy-saving, low cost, and the material is organic compounds can be degraded. According to calculations, the current organic thin-film solar cell materials have a power generation efficiency of about 10%, a thickness of only 1/1000 of that of silicon-based solar cells, and a power generation cost per watt is about 1/10 of that of polycrystalline silicon cells (feeling that they are competitive in the market). ).
Moreover, the organic thin-film solar cell has the flexibility to correspond to the curved surface (that is, it can be formed along the surface of the object). Experts from Japan’s Mitsubishi Chemical believe that houses and buildings are the best places to use such a battery in the future.
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