Propeller vs Quasi‐Planar 6‐Cantilever Small Molecular Platforms with Extremely Two‐Dimensional Conjugated Extension

Abstract Two exotic 6‐cantilever small molecular platforms, characteristic of quite different molecular configurations of propeller and quasi‐plane, are established by extremely two‐dimensional conjugated extension. When applied in small molecular acceptors, the only two cases of CH25 and CH26 that could contain six terminals and such broad conjugated backbones have been afforded thus far, rendering featured absorptions, small reorganization and exciton binding energies. Moreover, their distinctive but completely different molecular geometries result in sharply contrasting nanoscale film morphologies. Finally, CH26 contributes to the best device efficiency of 15.41 % among acceptors with six terminals, demonstrating two pioneered yet highly promising 6‐cantilever molecular innovation platforms.