Scientists in the U.S. and South Korea have identified what could be a new route to high-efficiency perovskite-silicon tandem solar cells. Through engineering negatively charged particles in the passivation layer, the group made a tandem cell with 26.7% efficiency. With further tweaks to the silicon layer they expect to be able to surpass 30%.
Chemists from Russia’s RUDN University have developed a series of compounds based on methylammonium iodide and iodine which they say could be used to make perovskite solar devices without toxic solvents. That would enable perovskite cells to be manufactured without chemical by-products.
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