![]() ![]() This layer shuttles electrons produced by the perovskite into the electrode, so the energy can be used. In this case, the team used quantum dots made of a type of tin oxide to serve as the electron-transport layer of the device. These tiny particles emit specific colors of light when illuminated, and are beginning to find use in things like TVs and solar cells. In past studies, scientists have tried to improve the stability by adding bulky molecules, old pigments, 2D additives, or chili compounds.įor the new study, researchers at EPFL and the Korea Institute of Energy Research tested out a new ingredient – quantum dots. Perovskite solar cells have stability issues and can degrade under real-world conditions, and their efficiency tends to drop on larger scales. Thin films of them are able to efficiently absorb the entire spectrum of visible light, they’re cheap to make, lightweight and flexible.īut of course, there’s a catch. Perovskite materials make effective solar cells for a few reasons. Engineers have now added a layer of quantum dots to the recipe, resulting in a more stable solar cell with near-record efficiency. Perovskite solar cells have come a long way in a short time, but there’s still room for improvement. ![]()
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