Optimized Spin Coating Rate for TiO2 Layer in Perovskite Solar Cell

Perovskite gained its popularity and intensively studied due to its excellent characteristics for the active layer in a solar cell. One component in perovskite solar cells is an electron transport layer. TiO2 is one of the materials that can be used as an electron transport layer and have excellent properties such as good stability and higher performance compared to another inorganic electron transport layer. In this work, we investigated the performance of perovskite solar cells by varying the spin coating rate when fabricating the TiO2 layer. Various spin coating rate was performed in this work ranging from 1000 rpm to 4000 rpm. The best performing devices are when the spin coating rate of the TiO2 layer was set to 3000 rpm.