| 초록 |
Carbon black(CB) has excellent electrical properties and can show long-term stability when applied to most of devices. In this study, we confirmed the effect of Perovskite solar cell with 0.01wt% CB:TiO2 electron transfer layer(ETL). Four types of the ETLs were fabricated, ① TiO2/mesoporous(mp) TiO2, ② CB:TiO2/mp TiO2, ③ TiO2/CB:mp TiO2, ④ CB:TiO2/CB:mp TiO2. Schematic of the device was FTO glass / TiO2/mp TiO2 ETL / Perovskite photoactive layer(AL) / spiro-OMeTAD hole transfer layer(HTL) / Ag. SEM imaging was used to confirm the morphology of ETLs, as a result all ETLs has porous surfaces. The chemical bonding of ETLs were confirmed by XPS, as a result Ti and O peak were same in all ETLs. The crystal structure of Perovskite AL was cubic, confirmed by XRD. The electrical characteristics of Perovskite solar cells were confirmed by solar simulator, TiO2/CB:mp TiO2 ETL device was the highest photoelectric conversion efficiency. |
