High‐Performance Organic Solar Cells Based on a Small Molecule with Alkylthio‐Thienyl‐Conjugated Side Chains without Extra Treatments

Abstract
A new 2D-conjugated small molecule with alkylthio-thienyl-conjugated side chains (BDTT-S-TR) is synthesized for application as a donor material in organic solar cells (OSCs). The OSCs based on BDTT-S-TR/PC70BM demonstrate a power conversion efficiency (PCE) of 9.20% without extra treatment. Moreover, an encouraging PCE of 6.68% is achieved from the device with active area of 144 mm2.
Funding Information
  • CRC 953 Deutsche Forschungsgemeinschaft
  • Solar Factory of the Future on the Energy Campus Nuremberg (20-3043.5)