Effect of ethanolamine passivation of ZnO nanoparticles in quantum dot light emitting diode structure

Kyeongchan Noh, Minsu Kim, Sang Hyun Lee, Hwang Sik Yun, Tae Hyeon Lim, Yeongho Choi, Ki Ju Kim, Yiran Jiang, Keonwon Beom, Minju Kim, Young Gwang Kim, Pilwoo Lee, Nuri Oh, Bong Hoon Kim, Chansun Shin, Hyun Ho Lee, Tae Sik Yoon, Moonsub Shim, Jaehoon Lim, Ki Bum KimSeong Yong Cho

Research output: Contribution to journalArticle

Abstract

The aging of ZnO nanoparticles in quantum dot light-emitting diode (QD-LED) structures was studied. Coarsening of as-synthesized ZnO nanoparticles is observed in both solution and thin film structures, which potentially deteriorates the performance of QD-LED devices over time. First, the temperature effect on ZnO coarsening was investigated, and it was revealed that aging of ZnO nanoparticles is faster at higher temperature due to a diffusion-controlled mechanism of nanoparticle coarsening. To observe aggregation of ZnO in the film state, the electron transporting part (ZnO/Al) of the QD-LED structure was prepared. The current density of a ZnO film and an electron-only device (QD/ZnO between two electrodes) was also measured. Resistance of the film increased as a function of aging time, which corresponded with observations of the ZnO film by optical microscopy. Aggregation of ZnO nanoparticles was directly measured by the root-mean-square value using atomic force microscopy. Ethanolamine (EA) stabilizer was added to the ZnO solution to disperse the ZnO nanoparticles without aggregation. The effect of EA on the surface passivation of the ZnO found to suppress pinhole formation, as revealed by scanning electron microscopy observations. Finally, the device lifetime was measured for QD-LEDs with EA-stabilized ZnO to understand the effect of ZnO aging on long-term QD-LED device operation.

Original languageEnglish (US)
Pages (from-to)998-1005
Number of pages8
JournalCurrent Applied Physics
Volume19
Issue number9
DOIs
StatePublished - Sep 2019

Fingerprint

Ethanolamines
Ethanolamine
Passivation
Semiconductor quantum dots
passivity
Light emitting diodes
light emitting diodes
quantum dots
Nanoparticles
nanoparticles
Coarsening
Aging of materials
Agglomeration
mean square values
Electrons
pinholes
Thermal effects
Optical microscopy
temperature effects
Atomic force microscopy

Keywords

  • Aging
  • Coarsening
  • Ethanolamine
  • ZnO

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Effect of ethanolamine passivation of ZnO nanoparticles in quantum dot light emitting diode structure. / Noh, Kyeongchan; Kim, Minsu; Lee, Sang Hyun; Yun, Hwang Sik; Lim, Tae Hyeon; Choi, Yeongho; Kim, Ki Ju; Jiang, Yiran; Beom, Keonwon; Kim, Minju; Kim, Young Gwang; Lee, Pilwoo; Oh, Nuri; Kim, Bong Hoon; Shin, Chansun; Lee, Hyun Ho; Yoon, Tae Sik; Shim, Moonsub; Lim, Jaehoon; Kim, Ki Bum; Cho, Seong Yong.

In: Current Applied Physics, Vol. 19, No. 9, 09.2019, p. 998-1005.

Research output: Contribution to journalArticle

Noh, K, Kim, M, Lee, SH, Yun, HS, Lim, TH, Choi, Y, Kim, KJ, Jiang, Y, Beom, K, Kim, M, Kim, YG, Lee, P, Oh, N, Kim, BH, Shin, C, Lee, HH, Yoon, TS, Shim, M, Lim, J, Kim, KB & Cho, SY 2019, 'Effect of ethanolamine passivation of ZnO nanoparticles in quantum dot light emitting diode structure', Current Applied Physics, vol. 19, no. 9, pp. 998-1005. https://doi.org/10.1016/j.cap.2019.05.016
Noh, Kyeongchan ; Kim, Minsu ; Lee, Sang Hyun ; Yun, Hwang Sik ; Lim, Tae Hyeon ; Choi, Yeongho ; Kim, Ki Ju ; Jiang, Yiran ; Beom, Keonwon ; Kim, Minju ; Kim, Young Gwang ; Lee, Pilwoo ; Oh, Nuri ; Kim, Bong Hoon ; Shin, Chansun ; Lee, Hyun Ho ; Yoon, Tae Sik ; Shim, Moonsub ; Lim, Jaehoon ; Kim, Ki Bum ; Cho, Seong Yong. / Effect of ethanolamine passivation of ZnO nanoparticles in quantum dot light emitting diode structure. In: Current Applied Physics. 2019 ; Vol. 19, No. 9. pp. 998-1005.
@article{dff1141f98964c46a18fbef5e7d15f85,
title = "Effect of ethanolamine passivation of ZnO nanoparticles in quantum dot light emitting diode structure",
abstract = "The aging of ZnO nanoparticles in quantum dot light-emitting diode (QD-LED) structures was studied. Coarsening of as-synthesized ZnO nanoparticles is observed in both solution and thin film structures, which potentially deteriorates the performance of QD-LED devices over time. First, the temperature effect on ZnO coarsening was investigated, and it was revealed that aging of ZnO nanoparticles is faster at higher temperature due to a diffusion-controlled mechanism of nanoparticle coarsening. To observe aggregation of ZnO in the film state, the electron transporting part (ZnO/Al) of the QD-LED structure was prepared. The current density of a ZnO film and an electron-only device (QD/ZnO between two electrodes) was also measured. Resistance of the film increased as a function of aging time, which corresponded with observations of the ZnO film by optical microscopy. Aggregation of ZnO nanoparticles was directly measured by the root-mean-square value using atomic force microscopy. Ethanolamine (EA) stabilizer was added to the ZnO solution to disperse the ZnO nanoparticles without aggregation. The effect of EA on the surface passivation of the ZnO found to suppress pinhole formation, as revealed by scanning electron microscopy observations. Finally, the device lifetime was measured for QD-LEDs with EA-stabilized ZnO to understand the effect of ZnO aging on long-term QD-LED device operation.",
keywords = "Aging, Coarsening, Ethanolamine, ZnO",
author = "Kyeongchan Noh and Minsu Kim and Lee, {Sang Hyun} and Yun, {Hwang Sik} and Lim, {Tae Hyeon} and Yeongho Choi and Kim, {Ki Ju} and Yiran Jiang and Keonwon Beom and Minju Kim and Kim, {Young Gwang} and Pilwoo Lee and Nuri Oh and Kim, {Bong Hoon} and Chansun Shin and Lee, {Hyun Ho} and Yoon, {Tae Sik} and Moonsub Shim and Jaehoon Lim and Kim, {Ki Bum} and Cho, {Seong Yong}",
year = "2019",
month = "9",
doi = "10.1016/j.cap.2019.05.016",
language = "English (US)",
volume = "19",
pages = "998--1005",
journal = "Current Applied Physics",
issn = "1567-1739",
publisher = "Elsevier",
number = "9",

}

TY - JOUR

T1 - Effect of ethanolamine passivation of ZnO nanoparticles in quantum dot light emitting diode structure

AU - Noh, Kyeongchan

AU - Kim, Minsu

AU - Lee, Sang Hyun

AU - Yun, Hwang Sik

AU - Lim, Tae Hyeon

AU - Choi, Yeongho

AU - Kim, Ki Ju

AU - Jiang, Yiran

AU - Beom, Keonwon

AU - Kim, Minju

AU - Kim, Young Gwang

AU - Lee, Pilwoo

AU - Oh, Nuri

AU - Kim, Bong Hoon

AU - Shin, Chansun

AU - Lee, Hyun Ho

AU - Yoon, Tae Sik

AU - Shim, Moonsub

AU - Lim, Jaehoon

AU - Kim, Ki Bum

AU - Cho, Seong Yong

PY - 2019/9

Y1 - 2019/9

N2 - The aging of ZnO nanoparticles in quantum dot light-emitting diode (QD-LED) structures was studied. Coarsening of as-synthesized ZnO nanoparticles is observed in both solution and thin film structures, which potentially deteriorates the performance of QD-LED devices over time. First, the temperature effect on ZnO coarsening was investigated, and it was revealed that aging of ZnO nanoparticles is faster at higher temperature due to a diffusion-controlled mechanism of nanoparticle coarsening. To observe aggregation of ZnO in the film state, the electron transporting part (ZnO/Al) of the QD-LED structure was prepared. The current density of a ZnO film and an electron-only device (QD/ZnO between two electrodes) was also measured. Resistance of the film increased as a function of aging time, which corresponded with observations of the ZnO film by optical microscopy. Aggregation of ZnO nanoparticles was directly measured by the root-mean-square value using atomic force microscopy. Ethanolamine (EA) stabilizer was added to the ZnO solution to disperse the ZnO nanoparticles without aggregation. The effect of EA on the surface passivation of the ZnO found to suppress pinhole formation, as revealed by scanning electron microscopy observations. Finally, the device lifetime was measured for QD-LEDs with EA-stabilized ZnO to understand the effect of ZnO aging on long-term QD-LED device operation.

AB - The aging of ZnO nanoparticles in quantum dot light-emitting diode (QD-LED) structures was studied. Coarsening of as-synthesized ZnO nanoparticles is observed in both solution and thin film structures, which potentially deteriorates the performance of QD-LED devices over time. First, the temperature effect on ZnO coarsening was investigated, and it was revealed that aging of ZnO nanoparticles is faster at higher temperature due to a diffusion-controlled mechanism of nanoparticle coarsening. To observe aggregation of ZnO in the film state, the electron transporting part (ZnO/Al) of the QD-LED structure was prepared. The current density of a ZnO film and an electron-only device (QD/ZnO between two electrodes) was also measured. Resistance of the film increased as a function of aging time, which corresponded with observations of the ZnO film by optical microscopy. Aggregation of ZnO nanoparticles was directly measured by the root-mean-square value using atomic force microscopy. Ethanolamine (EA) stabilizer was added to the ZnO solution to disperse the ZnO nanoparticles without aggregation. The effect of EA on the surface passivation of the ZnO found to suppress pinhole formation, as revealed by scanning electron microscopy observations. Finally, the device lifetime was measured for QD-LEDs with EA-stabilized ZnO to understand the effect of ZnO aging on long-term QD-LED device operation.

KW - Aging

KW - Coarsening

KW - Ethanolamine

KW - ZnO

UR - http://www.scopus.com/inward/record.url?scp=85066864240&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85066864240&partnerID=8YFLogxK

U2 - 10.1016/j.cap.2019.05.016

DO - 10.1016/j.cap.2019.05.016

M3 - Article

AN - SCOPUS:85066864240

VL - 19

SP - 998

EP - 1005

JO - Current Applied Physics

JF - Current Applied Physics

SN - 1567-1739

IS - 9

ER -