Triphenylamine-cored star-shape compounds as non-fullerene acceptor for high-efficiency organic solar cells: Tuning the optoelectronic properties by S/Se-annulated perylene diimide

Star-shaped S/Se-annulated perylene diimide as non-fullerene acceptors achieve high power conversion efficiencies of up to 6.10%. From sulfur to selenium, the heteroatom annulation improves the device performance.218