Exploiting nucleation and growth in the synthesis and electrical passivation of CdSe quantum dots

Justin F. Galloway, Jeaho Park, Kwan Hyi Lee, Denis Wirtz, Peter C. Searson

Research output: Contribution to journalArticlepeer-review

Abstract

The synthesis of CdSe quantum dots (QDs) is usually achieved through reaction of the appropriate precursors in a solution containing weakly adsorbing capping ligands. Here we compare nucleation and growth of CdSe QDs synthesized in hexadecylamine and trioctylphosphine oxide with stearic acid, hexylphosphonic phosphonic acid, or tetradecylphosphonic acid. We show that the nature of the capping ligand dramatically influences nucleation and growth, and can be used to control QD diameter and hence optical properties. We also show how electrical passivation with either ZnS or (Cd, Zn)S influences the size and optical properties of the QDs.

Original languageEnglish (US)
Pages (from-to)93-100
Number of pages8
JournalScience of Advanced Materials
Volume1
Issue number1
DOIs
StatePublished - Apr 1 2009

Keywords

  • CdSe
  • Core/Shell
  • Growth
  • Nucleation
  • Passivation
  • Quantum dots

ASJC Scopus subject areas

  • Materials Science(all)

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