Single-walled carbon nanotubes as efficient charge extractors in perovskite solar cell

We report the perovskite:SWNTs solar cells fabricated using solvent-solvent extraction (SSE) method at room temperature. Small quantities of Single-walled carbon nanotubes (SWNTs) are incorporated into perovskite Methylammonium lead halide (CH 3 NH 3 PbI 3 ) layer, and enhance the power conversion efficiency (PCE) of the perovskite solar cell from 8.5% to 10.6%. SWNTs act as hole transport channels boosting the extraction of holes and improving short-circuit current density (Jsc) from 14.54mA/cm 2 to 16.83mA/cm 2 . The concentration of SWNTs in the CH 3 NH 3 PbI 3 precursor solution plays crucial role in the performance of solar cells.