Solar panels could gain from a chemical which produces two electron-hole pairs from each incoming photon. Called heptacene, it has a characteristic called ‘singlet fission‘ which allows this doubling of electron production. BTW, there is no magic here, the pairs have at most half the energy than the best single pair that could be extracted ...
Read full article: Molecule makes two electrons from each photon
from Electronics Weekly https://www.electronicsweekly.com/blogs/engineer-in-wonderland/molecule-makes-two-electrons-photon-2017-04/
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