The Structural Origin of Chiroptical Properties in Perovskite Nanocrystals with Chiral Organic Ligands

Young-Hoon Kim, Ruyi Song, Ji Hao, Yaxin Zhai, Liang Yan, Taylor Moot, Axel Palmstrom, Roman Brunecky, Wei You, Joseph Berry, Jeffrey Blackburn, Matthew Beard, Volker Blum, Joseph Luther

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44 Scopus Citations

Abstract

The authors investigate how chiral ligands attached to perovskite nanocrystal (PNC) surfaces structurally distort the perovskite lattice. Chiral electro-optical properties of the resulting PNCs are demonstrated through the fabrication of a circularly polarized light (CPL) detector with a discrimination of up to 14% between left- and right-handed CPL. Both experimental and electronic-structure-based simulations are combined to provide insights into the interactions (both structural and electronic) between chiral organic ligands and PNCs. The major finding is a centro-asymmetric distortion of the surface lattice that penetrates up to five atomic unit cells deep into the PNCs, which is the likely cause of the chiral-optical properties. Spin-polarized transport through chiral-PNCs results from the chiral-induced spin selectivity effect and amplifies the discrimination between left and right-handed CPL as is experimentally demonstrated in the detectors.

Original languageAmerican English
Article number2200454
Number of pages10
JournalAdvanced Functional Materials
Volume32
Issue number25
DOIs
StatePublished - 2022

Bibliographical note

Publisher Copyright:
© 2022 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.

NREL Publication Number

  • NREL/JA-5900-81043

Keywords

  • chiral ligands
  • chiral transfer mechanism
  • circularly polarized light detector
  • colloidal perovskite nanocrystals
  • lattice distortion

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