Electrostatic force promoted intermolecular stacking of polymer donors toward 19.4% efficiency binary organic solar cells.

ABSTRACT: Conjugated polymers are generally featured with low structural order due to their aromatic and irregular structural units, which limits their light absorption and charge mobility in organic solar cells. In this work, we report a conjugated molecule INMB-F that can act as a molecular bridge via electrostatic force to enhance the intermolecular stacking of BDT-based polymer donors toward efficient and stable organic solar cells. Molecular dynamics simulations and synchrotron X-ray measurements reveal that the electronegative INMB-F adsorb on the electropositive main chain of polymer donors to increase the donor-donor interactions, leading to enhanced structural order with shortened π-π stacking distance and consequently enhanced charge transport ability. Casting the non-fullerene acceptor la

SUBMITTER: Gan Z 

PROVIDER: S-EPMC10562425 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature