Polyelectrolyte based hole-transporting materials for high performance solution processed planar perovskite solar cells

Using polyelectrolytes (P3CT-Na) as hole-transporting materials (HTMs), high performance inverted perovskite solar cells with a PCE of 16.6% could be obtained, which was more than 20% improvement compared with those based on the PEDOT:PSS HTM (PCE of 13.7%).