| 초록 |
All-polymer solar cells (all-PSCs), which comprise binary blends of donor and acceptor polymers, have attracted attention because of their advantages over conventional fullerene-based polymer solar cells (PSCs). Despite their advantages, most all-PSCs still exhibit low power conversion efficiencies (PCEs) that are far behind fullerene-based PSCs. This characteristic is mainly attributed to the unfavorable blend morphology of the donor and acceptor polymers. Thus, controlling the blend morphology of all-PSCs is a great challenge when obtaining highly efficient all-PSCs. Herein, we investigated the morphological control of blend system for PTB7-Th and P(NDI2OD-T2) in all-PSCs using 1,2,3,4,5-pentafluoro-6-phenoxybenzene (FPE) as an additive with microstructure analyses and PL quenching results. As a results, all-PSC devices that employ FPE as a processing additive exhibit an improved JSC with FF yielding a PCE of 4.5%, which represents a 55.2% improvement over the control devices. |
