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 journalArticlepeer-review

4 Citations (Scopus)


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
Issue number1
Publication statusPublished - 2011 Jan
Externally publishedYes


  • HTL
  • LEDs
  • Nanocrystal
  • Quantum dot

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics


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