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A rational molecular and device design by PolyU scientists enables 20% efficiency in organic solar cells - EurekAlert


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.

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