Singlet Exciton Lifetimes in Conjugated Polymer Films for Organic Solar Cells.

ABSTRACT: The lifetime of singlet excitons in conjugated polymer films is a key factor taken into account during organic solar cell device optimization. It determines the singlet exciton diffusion lengths in polymer films and has a direct impact on the photocurrent generation by organic solar cell devices. However, very little is known about the material properties controlling the lifetimes of singlet excitons, with most of our knowledge originating from studies of small organic molecules. Herein, we provide a brief summary of the nature of the excited states in conjugated polymer films and then present an analysis of the singlet exciton lifetimes of 16 semiconducting polymers. The exciton lifetimes of seven of the studied polymers were measured using ultrafast transient absorption spectroscopy and

SUBMITTER: Dimitrov SD 

PROVIDER: S-EPMC6432597 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature