Unexpected Anisotropy of the Electron and Hole Landé G-Factors in Perovskite CH3NH3PbI3 Polycrystalline Films
Nanomaterials (Basel, Switzerland)(2022)
Abstract
In this work, we studied, at low temperature, the coherent evolution of the localized electron and hole spins in a polycrystalline film of CH3NH3PbI3 (MAPI) by using a picosecond-photo-induced Faraday rotation technique in an oblique magnetic field. We observed an unexpected anisotropy for the electron and hole spin. We determined the electron and hole Landé factors when the magnetic field was applied in the plane of the film and perpendicular to the exciting light, denoted as transverse ⊥ factors, and when the magnetic field was applied perpendicular to the film and parallel to the exciting light, denoted as parallel ∥ factors. We obtained |ge,⊥|=2.600 ± 0.004, |ge,∥|=1.604 ± 0.033 for the electron and |gh,⊥|=0.406 ± 0.002, |gh,∥|=0.299 ± 0.007 for the hole. Possible origins of this anisotropy are discussed herein.
MoreTranslated text
Key words
halide perovskite,CH3NH3PbI3,g-factor,polycrystalline film,photo-induced Faraday rotation
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined