Naphtho[1,2-c:5,6-c']bis([1,2,3]thiadiazole) Enables an Efficient Halogen-Free Polymer Donor and Realizes Organic Solar Cells with Efficiency over 19%

Polymer donors with aromatic fused rings are considered as significance in reaching efficient non-fullerene organic solar cells (OSCs). In this contribution, a novel fused electron-withdrawing motif naphtho[1,2-c:5,6-c']bis([1,2,3]thiadiazole) (iNT) is developed...