Abstract

The electron-withdrawing halogen in organic cations could increase visible absorption and lower exciton-binding energy for layered perovskite compounds. Thus, F-PEA2MA2Pb3I10 perovskite achieves a power conversion efficiency of 5.8%, which is better than the reference H-PEA2MA2Pb3I10.

© 2019 The Author(s)

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