| 초록 |
The characteristics of Perovskite solar cells with the TiO2 electron transfer layer(ETL) coated by the cyclic voltammetry method were investigated. The three electrodes as a counter, reference, and working electrodes of the cyclic voltammetry method were composed of stainless steel, Ag / AgCl, and FTO glass, respectively. The cyclic voltammetry method was used for coating of the TiO2 on FTO substrate. The three electrodes were put in aqueous TiCl4 solution and electrochemically coated to 3 to 7 cycles at a scan rate of 0.01 V/s. The schematic of solar cell was FTO glass / TiO2 ETL / Perovskite(CH3NH3PbI3) / sprio-OMeTAD / Ag electrode. The chemical bond of the TiO2 2p3/2 peak was confirmed at 458.8 eV using XPS. The crystal structure of TiO2 was confirmed as the anatase and rutile structures by XRD. The electrical characteristics of the Perovskite solar cells with electrochemically coated TiO2 ETL were confirmed by a solar simulator. The photoelectric conversion efficiency of up to 8.4% was obtained in the Perovskite solar cells with TiO2 ETL coated four times by the cyclic voltammetry method. |
