Alumina/polymer-coated nanocrystals with extremely high stability used as a color conversion material in LEDs

Ju Yeon Woo, Jongsoo Lee, Chang-Soo Han

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The long-term stability of quantum dot (QD)-based devices under harsh environmental conditions has been a critical bottleneck to be resolved for commercial use. Here, we demonstrate an extremely stable QD/alumina/polymer hybrid structure by combining internal atomic layer deposition (ALD) infilling with polymer encapsulation. ALD infilling and polymer encapsulation of QDs synergistically prohibit the degradation of QDs in terms of optical, thermal and humid attacks. Our hybrid QD/alumina/polymer film structure showed no noticeable reduction in photoluminescence even in a commercial grade test (85% humidity at 85°C) over 28 days. In addition, we successfully fabricated a QD-based light-emitting device with excellent long-term stability by incorporating hybrid QD/alumina/polymer film as a color conversion material on light-emitting diode chips.

Original languageEnglish
Article number505714
JournalNanotechnology
Volume24
Issue number50
DOIs
Publication statusPublished - 2013 Dec 20

Fingerprint

Quantum Dots
Aluminum Oxide
Nanoparticles
Nanocrystals
Semiconductor quantum dots
Light emitting diodes
Polymers
Alumina
Color
Atomic layer deposition
Encapsulation
Polymer films
Light
Equipment and Supplies
Humidity
Atmospheric humidity
Photoluminescence
Hot Temperature
Degradation

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Alumina/polymer-coated nanocrystals with extremely high stability used as a color conversion material in LEDs. / Woo, Ju Yeon; Lee, Jongsoo; Han, Chang-Soo.

In: Nanotechnology, Vol. 24, No. 50, 505714, 20.12.2013.

Research output: Contribution to journalArticle

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