Utilizing electron-deficient thieno[3,4 c]pyrrole-4,6-dione (TPD) unit as π-bridges to improve the photovoltaic performance of A-π-D-π-A type acceptors
Control of the intramolecular charge transfer between the fused-ring core and terminal unit by selecting a suitable π-bridge have a strong impact on the photovoltaic performance of A-π-D-π-A type non-fullerene acceptors (NFAs). Here, we used a strong electron-deficient unit of thieno[3,4 c]pyrrole-4,6-dione (TPD) as π-bridges to synthesize a new NFA of TPD8, which exhibited a low optical bandgap of 1.46 eV. Organic solar cells based on PTQ10:TPD8 gave a power conversion efficiency (PCE) of 10.4% with a relatively high open-circuit voltage (VOC) of 0.91V and low energy loss of 0.55 eV. This work proved that electron-deficient units were also good choice to construct high-performance A-π-D-π-A type NFAs.
- This article is part of the themed collection: Journal of Materials Chemistry C HOT Papers