| 초록 |
Organic photovoltaics (OPVs) have the potential to revolutionize small-scale portable electronic applications by directly providing electric power to the systems. However, no route is available for monolithically integrating the energy-harvesting units into a system in which other components, such as transistors, sensors, or displays, are already fabricated. Here, we demonstrate for the first time all-inkjet-printed, all-air-processed OPVs with an average power conversion efficiency of 2%. We also report highly efficient printed OPVs (≈5%) with a simple three-layer structure whose cathode is the only non-printed layer made by evaporation. Our in-depth study on PCDTBT:PC70BM layers demonstrate that inkjet-printed blend layers exhibite similar nanoscale structure and excited state dynamics to spin-coated layers. We believe that these printed energy harvesting devices could allow for full integration into the manufacturing process of portable flexible electronic systems. |
