There are estimates that perovskite solar panels could cost just 10 to 20 cents per watt, compared to 75 cents per watt for traditional silicon-based panels — anywhere from 3X to 8X cost savings. Perovskite’s conversion efficiency has increased at an astounding rate over the last 4 years — from 4% to nearly 20%. And this is just the beginning — the theoretical limit of perovskite’s conversion efficiency is 66%, compared to silicon’s theoretical limit of 32%.

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