Sequential Growth of 2D/3D Double-Layer Perovskite Films with Superior X-Ray Detection Performance.

ABSTRACT: Perovskite materials in different dimensions show great potential in direct X-ray detection, but each with limitations stemming from its own intrinsic properties. Particularly, the sensitivity of two-dimensional (2D) perovskites is limited by poor carrier transport while ion migration in three-dimensional (3D) perovskites causes the baseline drifting problem. To circumvent these limitations, herein a double-layer perovskite film is developed with properly aligned energy level, where 2D (PEA)₂ MA₃ Pb₄ I₁₃ (PEA=2-phenylethylammonium, MA=methylammonium) is cascaded with vertically crystallized 3D MAPbI₃ . In this new design paradigm, the 3D layer ensures fast carrier transport while the 2D layer mitigates ion migration, thus offering a hi

SUBMITTER: Xu X 

PROVIDER: S-EPMC8564448 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature