| Abstract: | Three kinds of nonconjugated rigid perylene bisimide (PBI) derivatives based on a triptycene core were designed, synthesized and characterized. The unique three‐dimensional (3D) conformation of triptycene could enable formation of polymer with the favorable morphology for organic polymer solar cells (PSCs) by relieving the self‐aggregation of rigid PBI units. The low‐lying LUMO energy levels of these compounds demonstrated that they are very suitable for use as acceptors in organic solar cells. A higher power conversion efficiency (PCE) of 6.15 % was obtained for the blend film using the compound with two PBI units ( T‐2 ) as the acceptor and commercial poly4,8‐bis5‐(2‐ethylhexyl)thiophene‐2‐yl]benzo1,2‐b :4,5‐b ′]dithiophene‐2,6‐diyl]3‐fluoro‐2‐(2‐ethylhexyl)‐carbonyl]thieno3,4‐b ]thiophenediyl]] (PCE‐10) as the electron donor. |
