Disclosed herein are novel hole transporting materials comprising polycyclic heteroaromatic hydrocarbon compounds that are easy to synthesize and inexpensive. The hole transporting materials of the present disclosure have high hole mobility and thus do not require any doping. The hole transporting materials of the present disclosure also have matching frontier orbitals when used in devices with the perovskite and cathodes, facilitating hole migration across perovskite/hole transporting layers and hole transporting layer/cathode interfaces. The hole transporting materials of the present disclosure can further be hydrophobic with no moisture attracting atoms. The hole transporting materials can be used to form dense and uniform films on perovskite, and combined with hydrophobicity, form an excellent moisture barrier for the perovskite. With the present disclosure compound as the hole transporting layer in a perovskite solar cell, highly stable and highly efficient and inexpensive solar cells can be achieved.
展开▼
