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Untapping solar energy resources

The photovoltaics market has long been dominated by silicon, but further improvements of these solar cells require novel approaches. Now, triplet–triplet annihilation photon upconversion has been used to harvest photons from below the bandgap of silicon, extending the spectral response and potentially improving the efficiency of these cells.

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Fig. 1: Experimental design and mechanism of TTA-UC.


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Correspondence to Bo Albinsson.

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Albinsson, B., Olesund, A. Untapping solar energy resources. Nat. Photonics 14, 528–530 (2020).

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