Hole-Conductor and Metal Electrode-Free Planar Perovskite Solar Cells
Perovskite based solar cells without the hole conducting material and the evaporated metal
electrode would reduce the materials cost of the photovoltaic technology. In this study, we report fully
printable, organic-inorganic metal-halide perovskite solar cells with conversion efficiencies exceeding
7%. These fully printable devices were fabricated in a planar structure by directly printing a graphite
film on top of an underlying CH3NH3PbI3 perovskite layer. This fabrication method is attractive for
making low cost perovskite solar cells as no precious metals and expensive hole conducting materials
are required. Both planar and mesoscopic architectures were compared, with the planar structure better
compatible to the graphite electrode. Using the planar structure, it was found that a pure graphite layer of approximately
20 µm produced good device performance.
Keywords: Hole conductor free, metal electrode free, perovskite solar cells, printable solar cells.
Rights & PermissionsPrintExport