Design Rules of the Mixing Phase and Impacts on Device Performance in High-Efficiency Organic Photovoltaics.

ABSTRACT: In nonfullerene acceptor- (NFA-) based solar cells, the exciton splitting takes place at both domain interface and donor/acceptor mixture, which brings in the state of mixing phase into focus. The energetics and morphology are key parameters dictating the charge generation, diffusion, and recombination. It is revealed that tailoringthe electronic properties of the mixing region by doping with larger-bandgap components could reduce the density of state but elevate the filling state level, leading to improved open-circuit voltage (V _OC) and reduced recombination. The monomolecular and bimolecular recombinations are shown to be intercorrelated, which show a Gaussian-like relationship with V _OC and linear relationship with short-circuit current density (J

SUBMITTER: Song J 

PROVIDER: S-EPMC9362714 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature