Recently, the research group headed by Professor Zhang Jincheng, a member of Academician Hao Yue's team at the Faculty of Integrated Circuits, Xidian University, has, in collaboration with the Shanghai Institute of Space Power Sources, made remarkable strides in the research of wide-bandgap perovskite solar cell devices and their applications in tandem configurations. By incorporating polyhexamethylene guanidine hydrochloride as an additive, the team has successfully optimized the energy level alignment at the interface between the self-assembled monolayer and the perovskite material. This optimization has led to the suppression of interface defects and the promotion of perovskite crystallization. As a result, the power conversion efficiency of these solar cells has soared to an impressive 23.62%, with over 95% of this efficiency retained even after thermal aging tests. Furthermore, the power conversion efficiency of perovskite/silicon tandem solar cells has reached an unprecedented 32.49%, setting a new record in the field.