Figure 4. a Self-built spin coater, b Fixed sheet covered with perovskite solution before spin coating, c Titanium sheet with oxide layer covered with heat-resistant adhesive tape, d Sheet after heating, e Sheet covered with carbon powder, f Finished perovskite solar cell.

From

Approaching Tandem Solar Cells in Chemistry Classes

Philipp Lanfermann, Thomas Waitz, Mona Christin Maaß

World Journal of Chemical Education. 2023, 11(3), 60-64 doi:10.12691/wjce-11-3-7