Ring-fusion as a perylenediimide dimer design concept for high-performance non-fullerene organic photovoltaic acceptors

Year: 2016

Type: article

Abstract: , in the case of the twisted dimers ring fusion leads to a significant decrease in geminate recombination, hence increased OPV photocurrent density and power conversion efficiency. This effect is not observed in planar dimers where ring fusion leads to increased crystallinity and excimer formation, decreased photocurrent density, and decreased power conversion efficiency. These results argue that ring fusion is an effective approach to increasing OPV bulk-heterojunction charge carrier generation efficiency in PDI dimers as long as they remain relatively amorphous, thereby suppressing excimer formation and coulombically trapped charge transfer states.

Source: Chemical Science

DOI: 10.1039/c5sc04956c

Authors: Patrick E. Hartnett, H. S. S. Ramakrishna Matte, Nicholas D. Eastham, Nicholas E. Jackson, Yilei Wu, Lin X. Chen, Mark A. Ratner, Robert P. H. Chang, Mark C. Hersam, Michael R. Wasielewski, Tobin J. Marks

Institutions: Northwestern University, Materials Research Center

Language: English

Topic: Organic Electronics and Photovoltaics

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

Funders: U.S. Department of Energy, Northwestern University, Indo-US Science and Technology Forum, Office of Science, International Institute for Nanotechnology, Northwestern University, Basic Energy Sciences, Argonne National Laboratory

OpenAlex ID: W2261100516