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

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

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Heterojunctions
Photoluminescence
Infrared radiation
Quantum Dots
Semiconductors
Quantum confinement
Near-Infrared Spectroscopy
Excitons
Electron microscopy
Semiconductor quantum dots
Electron Microscopy
Energy gap
Tuning
Spectroscopy
Semiconductor materials
lead selenide
LDS 751

ASJC Scopus subject areas

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

Cite this

Synthesis of Type i PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission. / Williams, Kali R.; Diroll, Benjamin T.; Watkins, Nicolas E.; Rui, Xue; Brumberg, Alexandra; Klie, Robert F.; Schaller, Richard D.

In: Journal of the American Chemical Society, 01.01.2019.

Research output: Contribution to journalArticle

Williams, Kali R. ; Diroll, Benjamin T. ; Watkins, Nicolas E. ; Rui, Xue ; Brumberg, Alexandra ; Klie, Robert F. ; Schaller, Richard D. / Synthesis of Type i PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission. In: Journal of the American Chemical Society. 2019.
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AU - Schaller, Richard D

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