Layer-by-Layer Structural Identification of 2D Ruddlesden-Popper Hybrid Lead Iodide Perovskites by Solid-State NMR Spectroscopy

Jeongjae Lee, Woocheol Lee, Keehoon Kang, Takhee Lee, Sung Keun Lee

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

Application of two-dimensional (2D) organic-inorganic hybrid halide perovskites in optoelectronic devices requires a detailed understanding of the local structural features including the Pb-I bonding in the 2D layers and the organic-inorganic interaction between the organic spacer molecules and the perovskite layer. In this study, we show that 1H and 207Pb solid-state nuclear magnetic resonance (NMR) spectroscopy can serve as a noninvasive and complementary technique to probe the local structural features of the 2D Ruddlesden-Popper phase BA2MAn-1PbnI3n+1 (n = 1-4) with butylammonium (BA) spacers. 207Pb echo and 207Pb → 1H heteronuclear correlation experiments enable layer-by-layer structural detection of 2D halide perovskites. We show that the observed correlation between 207Pb NMR shifts and mean Pb-I bond lengths around each Pb site allows us to probe the local bonding environment of Pb. We envisage that this technique will be vital for a better understanding of the properties of materials as determined by the local atomistic environments in multidimensional halide perovskites.

Original languageEnglish
Pages (from-to)370-377
Number of pages8
JournalChemistry of Materials
Volume33
Issue number1
DOIs
Publication statusPublished - 2021 Jan 12

Bibliographical note

Publisher Copyright:
© 2020 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Materials Chemistry

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