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

Ju Yeon Woo; Jongsoo Lee; Chang Soo Han

doi:10.1088/0957-4484/24/50/505714

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 journal › Article › peer-review

14 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 language	English
Article number	505714
Journal	Nanotechnology
Volume	24
Issue number	50
DOIs	https://doi.org/10.1088/0957-4484/24/50/505714
Publication status	Published - 2013 Dec 20

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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10.1088/0957-4484/24/50/505714

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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.",

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

Abstract

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