Hexadecafluorophthalocyaninatocopper as an electron conductor for high-efficiency fullerene-free planar perovskite solar cells

Abstract High-efficiency fullerene-free planar perovskite solar cells (PSCs) consisting of hexadecafluorophthalocyaninatocopper (F 16 CuPc) as electron conductors are firstly reported. In the condition of using F 16 CuPc as a direct replacement for fullerene that universally employed in planar PSCs with an architecture of ITO/hole transport layer (HTL)/perovskite/electron transport layer (ETL), PSCs exhibit quite satisfactory photovoltaic performances. The best PSC with F 16 CuPc ETL presents a power conversion efficiency of 12.62% with a short-circuit current density (J SC ) of 19.97 mA/cm 2 , an open-circuit voltage (V OC ) of 0.93 V and a fill factor (FF) of 0.68. Such performance is comparable to the C 60 -based PSCs and higher than that of the PCBM-based PSCs.