Tetraphenylpyrrolo[3,2‐b]pyrroles: Synthesis, Thermal, Optical, Electrochemical Properties and Photovoltaic Applications

We reported two tetraphenylpyrrolo[3,2‐b]pyrroles in which the central core is functionalized by electron-rich functions: methoxy and di(4-methoxyphenyl)aminyl. The targeted compounds have good solubility in common organic solvents, high thermal stability and glass forming capacity. The optical and electrochemical properties of these compounds suggest use in a diverse range of applications. When utilized as the hole transporting layer of the planar perovskite solar cells, power conversion efficiencies ranging from 12.8 to 14.5% were obtained.