Construction of a 9,9′-bifluorenylidene-based small molecule acceptor materials by screening conformation, steric configuration and repeating unit number: a theoretical design and characterization

Abstract

The effects of molecular conformations, steric configurations and repeat units on the 99BF-based on photovoltaic properties were designed and compared at the molecular level. As a result, thep-conformational linear of the 4-unit molecule may be a high-performance 99′BF derivative.