Improved performance of nanocrystal quantum dots-based LEDs by modifying hole transport layer

Jihye Lee, Chang Soo Han, Sohee Jeong, Byoung Ho Kang, Seok Min Hong, Do Eok Kim, Shin Won Kang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Reported herein are the effects of the fabrication variables and surface capping of nanocrystal quantum dots (NQDs) on the characteristics of NQDs-based light-emitting diodes (LEDs). The molecular weight of the hole transport layer (HTL) material and the annealing conditions of the NQDs layer were chosen as fabrication process variables. Their effects on the layer characteristics and device efficiency were characterized. The maximum brightness varied over 50% according to the molecular weight of the HTL material. The optimized annealing temperature was shown to improve the maximum brightness by 20%. The surface-capping molecules of the NQDs were changed from conventional trioctyl phosphine/trioctyl phosphine oxide (TOPO/TOP) to pyridine and were incorporated into LEDs, and its effects on the device characteristics were discussed Copyright

Original languageEnglish
Pages (from-to)432-436
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number1
DOIs
Publication statusPublished - 2011 Jan

Keywords

  • HTL
  • LEDs
  • Nanocrystal
  • Quantum dot
  • TOPO/TOP

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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