Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT?Based Non?Fullerene Acceptors with PCE10 as Donor Polymer

Advancing non-fullerene acceptor (NFA) organic photovoltaics requires the mitigation of efficiency-limiting processes. Acceptor end-group and side-chain engineering are two handles to tune properties, a better understanding their specific impact on photophysics could facilitate more guided design. Here, device performance, energetic landscape, rhodanine dicyanovinyl end-capped IDT-based NFAs, namely, O-IDTBR O-IDTBCN, in PCE10-based solar cells compared by transient optical electro-optical spectroscopy techniques density functional theory calculations. It is revealed how acceptors’ quadrupole moments affect interfacial turn causing differences exciton quenching, charge dissociation efficiencies, geminate versus non-geminate recombination losses. More precisely, it found that open circuit voltage (VOC) controlled electron affinity (EA), while recombination, field dependence generation, rely moments. The kinetic parameters yields all processes determined, demonstrated they can reproduce performance devices’ current–voltage characteristics carrier drift-diffusion simulations. results provide insight into specifically role moment acceptor, beyond trivial considerations donor–acceptor energy offsets.