Fine-Tuning the 3D Structure of Nonfullerene Electron Acceptors Toward High-Performance Polymer Solar Cells.

Li, Haiyan; Hwang, Ye-Jin; Courtright, Brett A E; Eberle, Frank N; Subramaniyan, Selvam; Jenekhe, Samson A · Adv Mater · 2015

basic_science · Level V

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Abstract

Arylene linkers in a series of new tetraaza-benzodifluoranthene diimide dimers enable tuning of the 3D molecular structure of nonfullerene electron acceptors, facilitating observation of dramatic variation of the power conversion efficiency from 2.6% to 6.4% as the twist angle between the monomeric building blocks in the dimer is varied.