Among the silver bismuth iodides (SBI) in the compositions of Ag : Bi = 2 : 1–1 : 1, SBI-55 : 45 (Ag : Bi = 55 : 45) appears to be the most efficient light absorber providing a PCE of 2.31%.
Three novel carbazole-based molecules have been synthesized and successfully applied as hole-transporting materials (HTMs) of CH3NH3PbI3-based perovskite solar cells. In particular, the perovskite cell with SGT-405, having a three-arm-type structure, exhibited a remarkable photovoltaic conversion efficiency (PCE) of 14.79%.
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