Synthesis of Type i PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission

Kali R. Williams, Benjamin T. Diroll, Nicolas E. Watkins, Xue Rui, Alexandra Brumberg, Robert F. Klie, Richard D. Schaller*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Zero-dimensional PbSe quantum dots are heterogeneously nucleated and grown onto two-dimensional zincblende CdSe nanoplatelets. Electron microscopy shows ad-grown dots predominantly decorate edges and corners of the nanoplatelets. Spectroscopic characterizations relate type I electronic alignment as demonstrated via photoluminescence excitation spectroscopy enhancement of near-infrared emission. Transient photoluminescence and absorption convey ultrafast transfer of excitons to the lower energy semiconductor dots. These structures combine benefits of large absorption cross sections of nanoplatelets and efficient near-infrared emission of PbSe with quantum confinement tuning of energy gap.

Original languageEnglish (US)
Pages (from-to)5092-5096
Number of pages5
JournalJournal of the American Chemical Society
Issue number13
StatePublished - Apr 3 2019

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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