| 초록 |
Organic bulk-heterojunction solar cells have got much attention due to its unique properties such as low-cost solution process, semi-transparency, flexibility and so on. But the commercialization of organic solar cell has been delayed because of its poor ability to obtain sufficient photovoltaic efficiency compared to inorganic one. Recently, organic ferroelectric system using P(VDF-TrFE) to enhance photovoltaic efficiency factors have appeared. Ferroelectric P(VDF-TrFE) interlayer plays a role to help charge carriers to be extracted, as well as providing driving force for exciton dissociation. However, P(VDF-TrFE) interlayer is an insulator, thus charge carrier transport channel needs to be formed such as micro- or nano-structure. Here, from this view, I report the enhanced photovoltaic efficiency by using P(VDF-TrFE) nano-island structures embedded between photovoltaic organic active layer and buffer layers. |
