Photophysical implications of ring fusion, linker length, and twisting angle in a series of perylenediimide-thienoacene dimers.

ABSTRACT: Perylenediimide (PDI) derivatives have been widely studied as electron acceptor alternatives to fullerenes in organic photovoltaics (OPVs) because of their tunable absorption in the visible range, inexpensive synthesis, and photochemical stability. A common motif for improving device efficiency involves joining multiple PDIs together through electron-rich linkers to form a twisted acceptor-donor-acceptor molecule. Molecular features such as ring fusion are further employed to modify the structure locally and in films. These synthetic efforts have greatly enhanced OPV device efficiencies, however it remains unclear how the increasingly elaborate structural modifications affect the photophysical processes integral to efficient photon-to-charge conversion. Here we carry out a systematic study

SUBMITTER: Leonard AA 

PROVIDER: S-EPMC7654190 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature