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Title Scalable Fabrication of Flexible Large-area Inverted Organic Photovoltaic Cells
Authors (Jae Ha Myung) ; (Sung-Jin Kim) ; (Hyojin Kim) ; (Changhun Yun) ; (Moon Hee Kang)
Page pp.215-221
ISSN 1598-1657
Keywords Large-area OPV; flexible substrate; solution-process; low-temperature process; scalable
Abstract Scalable large-area inverted organic photovoltaic (OPV) cells were fabricated on a flexible polyethylene naphthalate (PEN) substrate. To account for the scalability and impact of the substrate (rigid versus flexible), OPVs of various sizes (0.04?1.6 cm2) were fabricated on flexible PEN and rigid glass substrates. A single OPV cell area of up to 1.6 cm2 can be fabricated using a solution process at a low temperature of < 160 ℃. It should be noted that all processes except those of the electrodes were conducted based on a solution process under ambient air conditions, not inside a N2 filled glove box. It was found from the numerical calculations and experimental measurements that a lower photoconversion efficiency (PCE) for higher areas mainly comes from a degradation in the fill factor (FF). Solar cell characteristic parameters were measured under an AM1.5G spectrum (intensity of 100 mW/cm2), and the PCE was 1.8% and 2.0% for the OPV on the PEN and glass substrates, respectively.