Colloidal CdSe quantum dot electroluminescence : Ligands and light-emitting diodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

33 Scopus Citations
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Author(s)

  • Andrea M. Munro
  • Julie A. Bardecker
  • Michelle S. Liu
  • Yen-Ju Cheng
  • Yu-Hua Niu
  • Ilan Jen-La Plante
  • David S. Ginger

Detail(s)

Original languageEnglish
Pages (from-to)345-350
Journal / PublicationMicrochimica Acta
Volume160
Issue number3
Publication statusPublished - Mar 2008
Externally publishedYes

Abstract

We examine the effects of surface ligand exchange on the performance of hybrid organic/inorganic light emitting diodes (LEDs) that use colloidal nanocrystal quantum dots as emissive centers. Using a series of primary alkylamines with different alkane chain lengths, we exchange the native surface ligands on a series of CdSe/CdZnS/ZnS core/shell/shell nanocrystal quantum dots and compare the differences in photoluminescence and electroluminescence efficiency of the emissive quantum dot layer. We fabricate LEDs made with octadecylamine-, octylamine-, and butylamine-exchanged quantum dots. We find that the differences in electroluminescence efficiency of the devices are not always proportional to the photoluminescence quantum efficiency of the quantum dots. We discuss this trend both in terms of the competing needs of high photoluminescence efficiency and good charge injection and energy transfer, and also in terms of the different processability and film morphology arising from the use of nanoparticles passivated with shorter ligands. © 2007 Springer-Verlag.

Research Area(s)

  • Nanocrystal, Nanoparticle, Surface chemistry

Citation Format(s)

Colloidal CdSe quantum dot electroluminescence : Ligands and light-emitting diodes. / Munro, Andrea M.; Bardecker, Julie A.; Liu, Michelle S.; Cheng, Yen-Ju; Niu, Yu-Hua; Plante, Ilan Jen-La; Jen, Alex K.-Y.; Ginger, David S.

In: Microchimica Acta, Vol. 160, No. 3, 03.2008, p. 345-350.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review