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Borrowing the structure of butterfly wings, scientists develop high-efficiency thin-film solar panels

recently, the team of California Institute of technology has improved the efficiency of thin-film solar cells by imitating the structure of a butterfly wing. If applied to solar panels, they can absorb 2-3 times more sunlight than traditional solar panels, and the absorption time can also be prolonged

scientists often use the body structure of insects to improve solar cells. Previously, Stanford University team used the compound eye knot of insects to increase the surface area of heat exchange by 25% to develop new perovskite solar cells. The National Laboratory of the United States designed solar panels with nano layered structure following the eyes of moths. Now, a team from California Institute of technology uses the structure on butterfly wings to improve the efficiency of thin-film solar cells

this butterfly is called pachliopta Aristolochiae, also known as seven star butterfly, red striped butterfly and red bellied butterfly. It is widely distributed in East Asia, including Taiwan, China, Pakistan, India, Nepal, Sri Lanka, Myanmar, Thailand, Vietnam, Cambodia, Indonesia, Philippines, Malaysia and other places where hydration reaction starts from the surface of cement particles, and is characterized by black back, There are dense red hairs on the side and tail of the abdomen, the front and rear wings are black, and the wing veins, veins and wing edges are gray or brown

Radwan Siddique, the author of the study, said that he accidentally found that irregular lattice structures with irregular size and shape are randomly distributed on the wings of butterflies, which helps butterflies regulate and preserve their body temperature in the cold season, so it aroused his interest. After scanning the specimen under the electron microscope, he saw that the openings of these nano lattice structures were less than 1 micron, which could scatter and absorb light of different wavelengths at different angles. Therefore, the color of this butterfly's wings was even darker than that of other species

the crystal cells on most solar panels must be positioned at a certain angle, so that they can face the sun directly to generate the most energy, and only a few hours a day can generate electricity. However, after applying this small hole structure of butterfly wings to thin-film solar cells, because the small hole greatly increases the absorption of light from extreme angles, the absorption of light is 2-3 times higher than that of previous solar panels, And the time to receive sunlight has also been lengthened, avoiding the damage of improper operation to the equipment, and more power can be produced

in the past, thin-film solar cells were mostly used in small electronic products such as watches because of their low efficiency. Now as long as a few more irregular holes were added to the battery, a cheaper and scalable high-efficiency thin-film solar panel could be created. More importantly, the process of creating these holes was very easy, and it took only 5-10 minutes to complete. The research was published in the journal science advances

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