| 초록 |
The new polymer Nap-SiBTz is designed and synthesized for fabrication of non-fullerene organic solar cells (NFOSCs) application. Nap-SiBTz is 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-bromo-6-undecylthieno[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 (SiBTz) as acceptor. The thermal and electrochemical properties of Nap-SiBTz were systematically studied. Interestingly, Nap-SiBTz exhibited wide band gap of 1.91 eV with highest occupied molecular orbital (HOMO) = -5.55 eV and lowest unoccupied molecular orbital (LUMO) = -3.64 eV, and showed better compalability with ITIC as non-fullerene acceptor. Therefore, Nap-SiBTz was blended with ITIC exhibited a power conversion efficiency of 4.76 %, open-circuit voltage of 0.77 V, a short-circuit current density of 11.60 mA/cm2, and fill factor of 53.18%. |
