| 초록 |
Low efficiency of charge separation and collection at electrodes following the exciton formation with photon absorption is a barrier to be overcome for the utilization of organic photovoltaic cells. Nanostructuring of photovoltaic devices is one of the most promising methods to shorten exciton diffusion length. This study is focusing on enhancing electron collecting efficiency by using carbon nanotube as a flexible and wide electrode in various nanostructured organic photovoltaics. The cells are composed of Al, CuPc, C60, (or TiO2), CNT, and polymer substrate. The possibility of carbon nanomaterials as an electrode were tested through the cell performance following the preparation by filtration and spin coating. Al, CuPc, and fullerene (or TiO2) layers were formed on carbon electrode by various methods such as immersion, spin coating, and thermal vacuum deposition. Photovoltaic characteristics were analyzed in the view of nanosized morphology and interfacial contact defects. |
