Diffusion-enhanced exciton dissociation in single-material organic solar cells

Single-material organic solar cells have recently attracted research attention due to their simplicity, morphological robustness and high yield of exciton dissociation. Using alpha-sexithiophene as a model system, we show that the single-event probability of the exciton dissociation at the boundaries of polycrystalline domains with different molecular orientation is extremely low (similar to 0.5%), while a high efficiency of charge generation is gained via hundred-fold crossings of the domain boundaries due to the long exciton diffusion length (similar to 45 nm).

Publication year:2021

BOF-keylabel:yes

IOF-keylabel:yes

BOF-publication weight:2

Authors:International

Authors from:Higher Education

Accessibility:Open