Research progress and design strategy of hole transport materials for perovskite solar cells

摘要： In this paper, the hole transport layer in perovskite solar cells is divided into inorganic materials, organic small molecular materials and polymer materials, and their development in recent years is reviewed. After focusing on the factors affecting the transport ability of the hole transport layer, it was found that the thiophene structure and the triphenylamine group can significantly improve the hole transporting ability of the hole transporting material, thereby designing two novel hole transporting materials TTT and TST. According to the simulation calculation of density functional theory, the energy level prediction of TTT and TST shows that the HOMO energy level can reach -5.27eV and -5.33eV respectively, which can achieve better energy level matching.