Scientists achieve 20% efficiency in organic solar cells with new molecular design

Surface topography of binary and ternary blend films. Credit: Nature Communications (2024). DOI: 10.1038/s41467-024-46022-3

To make organic solar cells (OSC) competitive, the light-absorbing molecules should simultaneously satisfy multiple key requirements, including a weak-absorption charge transfer state, a high dielectric constant, suitable surface energy and proper crystallinity.

Scientists at the Hong Kong Polytechnic University (PolyU) have developed a rational design of non-fullerene acceptor (NFA) with distinct photoelectric properties. This innovation has enabled organic solar cells to achieve an efficiency of 19.9%. The team further surpassed 20% efficiency mark beyond the NC work.
This achievement of 20% power conversion efficiency marks a significant …

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