| 초록 |
A novel wide-bandgap conjugated polymer (P1) is designed and synthesized which consists of 4,8-bis(5-(6-(1,1,1,3,5,5,5-heptamethyltrisiloxan-3-yl)hexyl)thiophen-2-yl)benzo[1,2-b:4,5-b`]dithiophene (BDT) as donor and 1,3-bis(2-ethylhexyl)-5,7-di(thiophen-2-yl)benzo[1,2-c:4,5-c`]dithiophene-4,8-dione (BDD) as acceptor unit. P1 was successfully synthesized via microwave-assisted Stille polymerization, and it has been successfully utilized to fabricate non-fullerene organic solar cells (NFOSC). These are processed at room temperature with chlorobenzene as solvent. The NFOSC exhibits the maximum power conversion efficiency (PCE) of 8.20% and low energy loss of 0.57 eV. The resulting efficiency is due to the combination of high and balanced bulky charge carrier mobility, and high crystallinity. These findings indicate that the introduction of siloxane-terminated side chains can be a powerful method toward high-performance NFOSCs for practical applications. |
