3-(Aminomethyl)piperidinium Spacer-Induced Dion-Jacobson 2D Perovskite Beneath CsPbI₃ for Stable and Efficient Inorganic Perovskite Solar Cells.

ABSTRACT: For the inorganic perovskite CsPbI₃, while many strategies have focused on passivating the top surface, engineering the interface beneath the perovskite layer remains a critical yet underexplored avenue, primarily due to the high crystallization temperature and the dissolution of underlying layers during solution processing. Here, these longstanding challenges are addressed by introducing a strategic placement of a Dion-Jacobson quasi-2D perovskite layer beneath CsPbI₃. Specifically, 3-(aminomethyl)piperidinium iodide (3AMPI₂), an organic salt insoluble in the CsPbI₃ precursor solution, is employed to form a robust quasi-2D interlayer without degradation during perovskite deposition and annealing. This bottom-layer integration passivates interfac

SUBMITTER: Kang S 

PROVIDER: S-EPMC12456381 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature