Towards non-blinking and photostable perovskite quantum dots

Surface defect-induced photoluminescence blinking and photodarkening are ubiquitous in lead halide perovskite quantum dots. Despite efforts to stabilize the surface by chemically engineering ligand binding moieties, blinking accompanied by photodegradation still poses barriers to implementing perovskite quantum dots in quantum emitters. To date, ligand tail engineering in the solid state has rarely been explored for perovskite quantum dots. We posit that attractive intermolecular interactions between low-steric ligand tails, such as π-π stacking, can promote the formation of a nearly epitaxial ligand layer that significantly reduces the quantum dot surface energy. Here, we show that single CsPbBr3 quantum dots…

• NS
  National Science Foundation

  Awards: 2025633, CHE-2102071, 2308691, ECCS-2025633, SCR_022202, 2102071, DMR-2308691
• UD
  U.S. Department of Energy

  Awards: SCR_022202, DE-SC0024441
• NU
  Northwestern University

  Award: ECCS-2025633
• UO
  University of Oklahoma
• OO
  Office of Science
• MR
  Materials Research Science and Engineering Center, Harvard University
• SC
  Supercomputing Center for Education and Research, University of Oklahoma
• DO
  Division of Materials Research

  Awards: ECCS-2025633, DMR-2308691, 2308691
• DO
  Division of Electrical, Communications and Cyber Systems

  Awards: ECCS-2025633, 2025633
• DO
  Division of Chemistry

  Awards: CHE-2102071, 2102071