摘要
A double-cable conjugated polymer DCPIC-BO is designed via introducing a long-branched alkyl chains 2-buthyloctyl into the acceptor side unit.Compared with the double-cable polymer(DCPIC-EH)with the 2-ethylhexyl alkyl chains,the solubility of the DCPIC-BO in non-halogen solvents is substantially improved.Therefore,a power conversion efficiency(PCE)of 9.77%can be obtained by the devices processed from o-xylene at 40℃,while the DCPIC-EH cannot be processed due to its poor solubility under this condition.Moreover,PCEs of 10.10%for small-area(0.04 cm^(2))devices and nearly 9%for devices with an area of 1 cm^(2) are achieved using a non-halogenated solid additive in o-xylene,realizing the"absolutely halogen-free"OSC fabrication.
基金
supported by Beijing Natural Science Foundation(Nos.JQ21006 and 2212045)
National Natural Science Foundation of China(NSFC,Nos.52073016 and 92163128)
supported by the Fundamental Research Funds for the Central Universities(Nos.buctrc202111,buctrc201828 and XK1802-2)
the Opening Foundation of State Key Laboratory of Organic-Inorganic Composites of Beijing University of Chemical Technology(No.oic-202201006).
