G. Sivakumar, Douglas Rosa Bernardo, P. Marchezi
Jan 15, 2020
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0
Influential Citations
8
Citations
Journal
Materials Chemistry and Physics
Abstract
Abstract Two dipyrrolo[2,3-b:2′,3′-e]pyrazine-2,6(1H,5H)-dione (PzDP)-based small molecules DPDV and DPEV with PzDP as the core building block and 4,5-dicyano-2-vinylimdazole (vinazene) as end-cap units were synthesized by Heck coupling reaction. The photophysical, electrochemical properties of DPDV and DPEV were investigated and applied as non-fullerene acceptors (NFAs) for solution-processed bulk heterojunction (BHJ) organic solar cells (OSCs). Theoretically evaluated optical and electrochemical properties were well matched with experimental values. Solution processed BHJOSCs employing poly[(4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl)-alt-(3-fluoro-2-[(2-ethylhexy)carbonyl]thieno[3,4-b]thiophene-4,6-diyl)] (PTB7) as the donor polymer and DPDV/DPEV as NFAs exhibited short-circuit current density (JSC) of 2.23/2.44 mA cm−2, open-circuit voltage (VOC) of 0.54/0.55 V, fill factor (FF) of 36.97/38.62 and power conversion efficiency (PCE) of 0.45/0.52%, respectively.