This talk will discuss our progress in developing non-fullerene electron acceptors for OPV solar cells. Multiple approaches and design ideas were taken to search the materials. It was found that a cluster type of electron acceptor, TPB, bearing four α-perylenediimides (PDIs), was an electron acceptor that rivals fullerenes. The four PDIs form a cross-like molecular conformation while still partially conjugated with the BDT-Th core. The blend TPB:PTB7-Th films show favorable morphology and efficient charge dissociation. The inverted solar cells exhibited the highest PCE of 8.47% with the extraordinarily high Jsc values (&gt;18 mA/ cm2), comparable with those of the corresponding PC71BM/PTB7-Th-based solar cells.

Development of new electron acceptors for high efficient, non-fullerene OPV solar cells

253rd National Meeting (2017)

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