Efficient CdSe/CdS quantum dot light-emitting diodes using a thermally polymerized hole transport layer

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

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Author(s)

  • Jialong Zhao
  • Julie A. Bardecker
  • Andrea M. Munro
  • Michelle S. Liu
  • Yuhua Niu
  • I.-Kang Ding
  • Baoquan Chen
  • David S. Ginger

Detail(s)

Original languageEnglish
Pages (from-to)463-467
Journal / PublicationNano Letters
Volume6
Issue number3
Online published1 Feb 2006
Publication statusPublished - 1 Mar 2006
Externally publishedYes

Abstract

We report multilayer nanocrystal quantum dot light-emitting diodes (QD-LEDs) fabricated by spin-coating a monolayer of colloidal CdSe/CdS nanocrystals on top of thermally polymerized solvent-resistant hole-transport layers (HTLs). We obtain high-quality QD layers of controlled thickness (down to submonolayer) simply by spin-coating QD solutions directly onto the HTL. The resulting QD-LEDs exhibit narrow (∼30 nm, fwhm) electroluminescence from the QDs with virtually no emission from the organic matrix at any voltage. Using multiple spin-on HTLs improves the external quantum efficiency of the QD-LEDs to ∼0.8% at a brightness of 100 cd/m2 (with a maximum brightness over 1000 cd/m2). We conclude that QD-LEDs could be made more efficient by further optimization of the organic semiconductors.

Citation Format(s)

Efficient CdSe/CdS quantum dot light-emitting diodes using a thermally polymerized hole transport layer. / Zhao, Jialong; Bardecker, Julie A.; Munro, Andrea M.; Liu, Michelle S.; Niu, Yuhua; Ding, I.-Kang; Luo, Jingdong; Chen, Baoquan; Jen, Alex K.-Y.; Ginger, David S.

In: Nano Letters, Vol. 6, No. 3, 01.03.2006, p. 463-467.

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