| 초록 |
In conventional structure polymer solar cells (PSCs), PEDOT:PSS is the most commonly used material as the hole transporting layer on ITO anode. However, PEDOT:PSS can cause lowering performance and long-term stability of PSCs due to their acidity and hygroscopicity. For those weaknesses, inverted structure PSCs have received a lot of attentions. Metal oxides such as ZnO and TiOx are usually used as the electron collecting layer in inverted structure PSCs because of their high transmittance and good carrier mobility. However, inorganic electron collecting layer could have poor interfacial contact with photoactive layer, resulting in low carrier mobility. In this study, we synthesized anthracene derivative which has good alcohol-water solubility, electron collection and interfacial contact with photoactive layer, and it was introduced as the electron transporting layer in low bandgap polymer-based inverted solar cells. As a result, the power conversion efficiency (PCE) and stability were enhanced compared with conventional structure PSCs. |
