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A New Kind Of Durable Perovskite Solar Cells Is Discovered Inspired By The Structure Of The Insect Eyes

- Sep 01, 2017 -

According to foreign media reports, the scientist team of Stanford University found a key way to develop perovskite solar cells, inspired by the honeycomb structure of insect eyes. Solar cells are able to be more durable in this way and compared to silicon solar cells, this new perovskite cell is also much cheaper and easier to manufacture.

This kind of perovskite material first used in solar cells was in 2009. A main problem this material faces is that the salt-like crystal structure makes it very fragile. The vast majority of solar equipment, including solar roofs, are flat. The moisture, air, heat and even prolonged exposure to sunlight will make the solar equipment that include perovskite solar cells easily damaged.

In order to solve the problem, the scientist team of Stanford University tried to sought for inspiration in natural world and observe insects’ eyes specially. The flies' eyes consist of thousands of hexagonal photoreceptor units and are protected by a "stent". The team decided to follow this model and developed a honeycomb perovskite microcell that was protected by a hexagonal bracket with a width of 0.02 inches.

Researchers discovered that this stent makes the battery more resistant to cracks, but has almost no impact on its conversion efficiency. The team also tested the honeycomb solar cells’ durability by putting them under 85℃ temperature and 85% humidity. They still worked very well and could last for 6 weeks.

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