Additive-assisted strategy for high-efficiency organic solar cells

Abstract

Herein, we summarize the recent advances of the additive-assisted strategy with solvent/solid additives and binary additives and their working mechanism in OSCs.

Prolonging the exciton diffusion length by manipulating molecular stacking enables pseudo-planar heterojunction organic solar cells to achieve over 19% efficiency

“…The solid additive having multi-fluorination, SA-5F, possesses a similar chemical structure as the end groups of the classical non-fullerene acceptors, which have strong intermolecular interaction with non-fullerene acceptors. 27,28 The chemical structure of the polymer donor (D18) used in this work, the synthetic route for SA-5F and the corresponding details are presented in the ESI (Fig. S1 and S2) †.…”