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Derya publishes Non-Fullerene Acceptor (NFA) – Polymer solar cells with an quantum efficiency approaching unity in Nature Communications

By designing spectrally overlapping composites of polymeric donors with non-fullerene acceptors, Derya demonstrated NFA solar cells with quantum efficiencies approaching unity. The combination of strongly absorbing donors and acceptors allowed to design composites which absorb nearly all light in a wavelength regime between 570 to 700 nm. A near to optimum microstructure arrangement between the two phases enabled conversion of the absorbed light into free carriers with a quantum efficiency close to unity, resulting in short-circuit current densities of about 20 mA cm−2.