A Smooth CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Film via a New Approach for Forming the PbI<sub>2</sub> Nanostructure Together with Strategically High CH<sub>3</sub>NH<sub>3</sub>I Concentration for High Efficient Planar‐Heterojunction Solar Cells
Distribution of the number of citations over years.