Clean interface without any intermixed state between ultra-thin P3 polymer and CH₃NH₃PbI₃ hybrid perovskite thin film.

ABSTRACT: Hole transport layers (HTL) are crucial materials to improve the power conversion efficiency in organohalide hybrid perovskite-based solar-cell applications. Two important physical properties are required in HTL materials: good hole mobility and air-protection. After HTL solution-based deposition, an intermixed chemical state at the interface between HTL and hybrid perovskite is key to confirming the physical property of HTL. We performed high-resolution x-ray photoelectron spectroscopy to investigate the chemical states at the interface between an ultra-thin P3 polymer and CH₃NH₃PbI₃ hybrid perovskite thin film. At the interface, we found no apparent intermixed chemical state. Furthermore, we confirmed that the P3 HTL with the ultra-thin layer (7?nm) protected the hybrid perovskite material against air-exposure for 2 weeks.

SUBMITTER: Jung MC 

PROVIDER: S-EPMC6659629 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature