Structural Dynamics of Polymer:Non-Fullerene Organic Solar Cell Blends: A Neutron Spectroscopy Perspective

Organic solar cells (OSCs) based on ADA-type (acceptor-donor-acceptor) non-fullerene acceptors (NFAs) exhibit improved power conversion efficiency (PCE) compared to the conventional fullerene-based analogues. The optoelectronic properties of OSC active layer blends are correlated their underlying structural dynamics and therefore influence device performance. Using synergistically different neutron spectroscopy techniques, we studied binary ternary made NFAs O-IDTBR O-IDFBR regioregular donor polymer P3HT. Deuteration was considered for a contrast variation purpose. In addition shedding light miscibilty alloying characters blends, main outcome this work is evidenced similar dynamical response blend components. This finding in with our previous molecular studies P3HT:PCBM, where highlighted distinct behaviors P3HT PCBM terms vitrification/frustration plasticization by upon blending. Alike vitrification not presently observed. absence or weak here line recent reports likely related PCE exhibited NFA-based OSCs.