Efficient polymer solar cells that use conjugated polyelectrolyte with a tetravalent amine-end side chain

Publisher:王叶Release time:2020-05-28Browse times:170

作者:Shi, YQ (Shi, Yueqin)

ORGANIC ELECTRONICS

卷: 77

文献号: UNSP 105542

DOI: 10.1016/j.orgel.2019.105542

Conjugated polyelectrolyte based on benzotriazole (BT) with tetravalent amine-end side chain and benzothiadiazole (BTz) conjugated alternating repeat units, named PBTBTz-TMAI was initially designed and synthesized. Fullerene- and non-fullerene-based polymer solar cells were fabricated using PBTBTz-TMAI as the cathode interlayer. Consequently, power conversion efficiencies of 8.4% and 10.5% were achieved for the fullerene PTB7: PC71BM-based and non-fullerene PBDB-T:ITIC-based single-junction devices, respectively. The enhanced performance is attributed to the appropriate energy level alignment of the active layer with PBTBTz-TMAI and the efficient electron transfer from the active layer to the cathode electrode.