| 초록 |
Organic photovoltaics(OPVs) are a good candidate for cost effective, solution processable and light weight electronic devices. Typically fabricated OPVs are consisted of ITO (anode), active layer coated from P3HT(poly(3-hexylthiophene))/PCBM([6,6]-phenyl-C61-butyric acid methyl ester)blend solution and metal cathode layer. However, excitons generated from conjugated polymers have a few nanometers diffusion length, such that charged carriers cannot be completely dissociated into each electrode including ITO and metal cathode. To solve this problem, we introduced n-type and p-type doped carbon nanotubes (CNTs) within P3HT/PCBM blend solutions. n-type and p-type CNTs mean nitrogen and boron replaced carbon atoms in the graphite networks respectively. n-type and p-type CNTs can split excitons generated from conjugated polymers and easily transfer the charged carriers. Therefore, CNTs provide a good charge pathway to improve the carrier mobility within active layers of OPVs. |
