Synthesis and Characterization of Lactam-based Novel Acceptor Unit for Organic Solar Cells (OSCs)
발표자
()
초록
내용
We synthesized new lactam-based acceptor unit, pyrido[2,3-g]quionoline-2,7(1H,6H)-dione (PQD) and using this acceptor unit, two lactam-based polymers, poly(3-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophen-2-yl)-1,6-didodecylpyrido[2,3-g]quinoline-2,7(1H,6H)-dione) (PPQD-BDT) and poly(3-(5-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophen-2-yl)-4-(2-ethylhexyl)thiophen-2-yl)-1,6-didodecyl-8-(4-(2-ethylhexyl)thiophen-2-yl)pyrido[2,3-g]quinoline-2,7-(1H,6H)-dione) (PPQDT-BDT), with or without thiophene spacer were finally synthesized and characterized their optical, electrochemical properties. Two polymers have wide-band gap energy level about 1.90 eV with a maximum absorption at 550 nm. To understand photovoltaic performance of two polymers, we fabricated photovoltaic devices with inverted structure. As a result, PPQDT-BDT showed better performance, a PCE of 2.86% with a JSC of 7.54 mA/cm2.