Abstract: A novel carbazole-based molecule Cz-3Th was synthesized and successfully applied as hole-transporting material (HTM) of CH3NH3PbI3-based perovskite solar cells.The investigated hole-transporting material was synthesized in two steps from commercially available and relatively inexpensive starting reagents.The Cz-3Th was exploited in lead halide planar perovskite solar cells using low-temperature solution-processed SnO2 as the electron transporting layers, delivering a power conversion efficiency(PCE) of 2.68; with an open-circuit voltage(Voc) of 0.75 V under 100 mW/cm2 AM 1.5 G solar illumination.These promising results highlight the potential application of the Cz-3Th in the cost-effective and environment-friendly perovskite solar cells.

Key words: A novel carbazole-based molecule Cz-3Th was synthesized and successfully applied as hole-transporting material (HTM) of CH3NH3PbI3-based perovskite solar cells.The investigated hole-transporting material was synthesized in two steps from commercially available and relatively inexpensive starting reagents.The Cz-3Th was exploited in lead halide planar perovskite solar cells using low-temperature solution-processed SnO2 as the electron transporting layers, delivering a power conversion efficiency(PCE) of 2.68; with an open-circuit voltage(Voc) of 0.75 V under 100 mW/cm2 AM 1.5 G solar illumination.These promising results highlight the potential application of the Cz-3Th in the cost-effective and environment-friendly perovskite solar cells.