| 초록 |
The new polymer Nap-SiBTA is designed and synthesized for fabrication of non-fullerene organic solar cells (NFOSCs) application. Nap-SiBTA comprised of 4,8-bis(5-(6-((2-hexyldecyl)oxy)naphthalen-2-yl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene as donor and 4,7-bis(5-bromothieno[3,2-b]thiophen-2-yl)-5,6-difluoro-2-(6-(1,1,1,3,5,5,5-heptamethyltrisiloxan-3-yl)hexyl)-2H-benzo[d][1,2,3]triazole (SiBTA) as acceptor. The thermal, photophysical and electrochemical properties of Nap-SiBTA were systematically investigated. Interestingly, Nap-SiBTA exhibited wide band gap of 1.90 eV with highest occupied molecular orbital (HOMO) = -5.30 eV and lowest unoccupied molecular orbital (LUMO) = -3.40 eV, and showed better compatibility with IT-4F as non-fullerene acceptor. Therefore, Nap-SiBTA blended with IT-4F exhibited a efficiency of 7.30 %, open-circuit voltage of 0.80 V, a short-circuit current density of 17.80 mA/cm2, and fill factor of 50.61%, respectively. |
