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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

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
JournalJournal of the American Chemical Society
DOIs
Publication statusPublished - Jan 1 2019

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Synthesis of Type i PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission'. Together they form a unique fingerprint.

  • Cite this