Rigidifying Nonplanar Perylene Diimides by Ring Fusion Toward Geometry-Tunable Acceptors for High-Performance Fullerene-Free Solar Cells
Journal
Advanced Materials
Journal Volume
28
Journal Issue
5
Pages
951-958
Date Issued
2016
Author(s)
Abstract
Rigid fused perylene diimide (PDI) dimers bridged with heterocycles exhibit superior photovoltaic performance compared to their unfused semiflexible analogues. Changing the chalcogen atoms in the aromatic bridges gradually increases the twist angles between the two PDI planes, leading to a varied morphology in which the one bridged by thiophene achieves a balance and shows the best efficiency of 6.72%.
SDGs
Publisher
Wiley-VCH Verlag
Type
journal article