One-step facile synthesis of a simple carbazole-cored hole transport material for high-performance perovskite solar cells

One-step facilely synthesized carbazole-cored hole transport material has afforded the solution-processed perovskite solar cells with a maximum power conversion efficiency of 18.32%, comparable to that of the mostly used spiro-OMeTAD. The unit cost of hole transport layer can be cut down to 1/80 of that of spiro-OMeTAD by using this new material.224