Chemical role of amines in the colloidal synthesis of CdSe quantum dots and their luminescence properties

Katsuhiro Nose, Hiroshi Fujita, Takahisa Omata, Shinya Otsuka-Yao-Matsuo, Hiroyuki Nakamura, Hideaki Maeda

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

The role of organic amines in the colloidal synthesis of CdSe quantum dots (QDs) has been studied. CdSe QDs were synthesized from the source solutions containing 5 vol% of amines having various alkyl chain lengths, stereochemical sizes and electron donation abilities. The role of the additional amines was evaluated on the basis of the photoluminescence (PL) properties such as PL wavelength and intensity of the obtained CdSe QDs. The observed PL spectra were explained by the fact that the amines behaved as capping ligands on the surface of the QDs in the product colloidal solution and complex ligands for cadmium in the source solutions. It was shown that the particle size was controlled by the diffusion process depending on the mass and stereochemical shape of the amines, and the luminescence intensity increased with the increasing electron donation ability and capping density of the amines.

Original languageEnglish
Pages (from-to)21-26
Number of pages6
JournalJournal of Luminescence
Volume126
Issue number1
DOIs
Publication statusPublished - 2007 Sep 1
Externally publishedYes

Keywords

  • Cadmium selenide
  • Colloidal synthesis
  • Organic amines
  • Photoluminescence spectra
  • Quantum dots

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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