Thiolated truxene derivatives as hole-transporting materials for efficient perovskite solar cells

New C3 symmetric star-shaped thiolated hole-transporting materials (HTMs) including a truxene core have been successfully synthesized and investigated for high performance perovskite solar cells. These findings open the opportunities for efficient HTMs based on the functionalized truxene utilizing the strong interactions of their functional groups with perovskite. Maximum power conversion efficiency (PCE) of 11.87 % has been achieved by employing thiolated truxene derivatives.