Abstract

The recent surge in the efficiency of organic photovoltaic devices (OPVs) largely hinges on the reduction of energy loss (Eloss) that leads to improvements in open-circuit voltage (VOC). However, there are still many unclarified factors regarding the relationship between the molecular structure and VOC, hampering the establishment of widely applicable, effective principles for the design of active-layer materials. In this contribution, we examined the origin of the large VOC shifts induced by minor structural differences in end-alkyl substituents on a series of anthracene-based p-type compounds.

© 2021 The Author(s)