| 초록 |
Photo-rechargeable self-powered system(PSS) composed of the inverted organic solar cell(iOSC) and supercapacitor(SC) is studied. The iOSC harvests an energy and the SC stores the energy. More importantly, these devices share an indium-tinoxide(ITO) electrode that supplies improved charge transfer thorough the devices. Integration of the energy harvesting and storage units in this way significantly reduces the limitations of each device. The power fluctuation generated by the iOSC can be recompensed by the SC. Furthermore, the SC is often charged by the iOSC during the daytime, thereby reducing the charging time and avoiding a complete discharge. When the SC of the PSS is charged by the iOSC under AM 1.5 G of illumination, the overall energy conversion-storage efficiency is ca. 2.27%. In this regard, we demonstrate an effective strategy to form a lightweight, small, portable/wearable self-powered system by integrating energy harvesting and energy storage units into a single structure.
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