| 초록 |
Metal oxide has been introduced as electron transporting layer(ETL) in inverted organic photovoltaics(OPVs) due to its transparency, electrical conductivity and ability to solution process. But, when performing layers with these metal oxide, oxygen vacancy and surface defect occur and act as trap site. These defects also form hydrophilic surface, which make interfacial contact with active layer became poor. Addition of processes such as ion doping and solvent treatment to the ETL can improve performance of OPV because it is a way to remove defect. Conjugated polyelectrolytes(CPEs), material consist of π-conjugated backbone with ionic side chain, are widely used in OPVs. Also, chelating agents can form stable complex with metal. Therefore, in this study, we fabricated solar cells with improved interfacial contact and better performance using chelating agents that can reduce defect in existing metal oxide and CPEs that are soluble in polar solvent and can make hydrophobic surface. |
