Atomic structure and defect dynamics of monolayer lead iodide nanodisks with epitaxial alignment on graphene
Name
s41467-020-14481-z.pdf
Description
Published version
Size
5.69 MB
Format
Adobe PDF
Checksum (MD5)
e79f7c968bd5eb7991323fd40cbd6a9a
Author(s)
Zhu, Taishan
France-Lanord, Arthur
Grossman, Jeffrey C.
Date Issued
February 2020
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Sinha, Sapna et al. “Atomic structure and defect dynamics of monolayer lead iodide nanodisks with epitaxial alignment on graphene.” Nature Communications, 11, 1 (February 2020): 823 © 2020 The Author(s)
Version
Final published version
Abstract
Lead Iodide (PbI₂) is a large bandgap 2D layered material that has potential for semiconductor applications. However, atomic level study of PbI2 monolayer has been limited due to challenges in obtaining thin crystals. Here, we use liquid exfoliation to produce monolayer PbI2 nanodisks (30-40 nm in diameter and > 99% monolayer purity) and deposit them onto suspended graphene supports to enable atomic structure study of PbI2. Strong epitaxial alignment of PbI2 monolayers with the underlying graphene lattice occurs, leading to a phase shift from the 1 T to 1 H structure to increase the level of commensuration in the two lattice spacings. The fundamental point vacancy and nanopore structures in PbI2 monolayers are directly imaged, showing rapid vacancy migration and self-healing. These results provide a detailed insight into the atomic structure of monolayer PbI2, and the impact of the strong van der Waals interaction with graphene, which has importance for future applications in optoelectronics.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/S41467-020-14481-Z
