Abstract
In this study, we fabricated inverted organic solar cells (i-OSCs) using line-patterned interlayer for electron extraction. The short circuit current density (JSC) of line-patterned interlayer device increased drastically, while the fill factor (FF) decreased rather than flat-type interlayer device. So, an additional flat-type Zinc oxide (ZnO) layer with 1% vol. ethylene glycol (EG) added as an additive between the line-patterned ZnO layer and the ITO electrode was fabricated. The addition of EG in ZnO precursor has reported that the oxygen molecules in EG passivate the surface defects of ZnO and alters its electron affinity of ZnO. As a result, the power conversion efficiency (PCE) of the line-patterned devices introduced an additional flat-type ZnO layer and a ZnO precursor with 1% vol. EG was enhanced from 6.5% to 7.6%.
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