A new electron-accepting π-conjugated compound containing fluorinated naphthobisthiadiazole (FNTz) is designed and synthesized for application as an acceptor in organic solar cells (OSCs). Physical measurements show that the introduction of fluorine atoms in the naphthobisthiadiazole (NTz) unit has considerable influence on the absorption behavior and frontier orbital energy levels of molecules. In OSCs, the FNTz-based acceptor in combination with poly(3-hexylthiophene) (P3HT) as a donor exhibits a significant improvement in power conversion efficiency compared to the corresponding nonfluorinated NTz-based acceptor. This study demonstrates the potential of FNTz as an electron-accepting unit in organic semiconductors.
- Shreyam Chatterjee
- Yutaka Ie
- Yoshio Aso
