Fig. 6: The dynamical simulations for the effect of the connectivity of the electron transport network in BHJs.
The evolution of the charge center position xc of the negative polaron in the (a) polymer, (b) oligomer, and c small molecular acceptor-based devices with A-to-A-type J-aggregation structural models under an applied electric field of E0 = 4 × 105 V/cm. The time evolutions of the total net charge quantity Qm (t) (unit: e) in (d) polymer, (e) oligomer, and f small molecular acceptor-based devices, after an applied electric field for E0 = 4 × 105 V/cm. g The statistics of the transport rate ratios of the polaron centers of the three systems as a function of d values. h The evolution of the charge center position xc of the negative polaron in the oligomer acceptor-based devices with different transfer integrals between linking units under an applied electric field of E0 = 4 × 105 V/cm. i The second smallest eigenvalue of the Laplacian matrix corresponding to the graph structures of different molecules is used to represent the algebraic connectivity of molecular structures as a function of weak interaction forces. j Schematic diagram of the remaining electrons after being trapped, with the change in the proportion of acceptors. Red (yellow in small molecular cases) dots represent the donor and acceptor moieties weight ratio of 0.6:0.4, while blue dots represent the donor and acceptor moieties weight ratio of 0.4:0.6.
