Enhancing efficiency of quantum dot/photoresist nanocomposite using wrinkled silica-quantum dot hybrid particles

Kiju Um, Hyo Jun Kim, Joon Hee Jo, Hyungjoon Jeon, Hye Bin Yang, Young Joo Kim, Kangtaek Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have synthesized hybrid particles by embedding CdSe/ZnS quantum dots (QDs) into wrinkled silica nanoparticles. We found that increasing the QD loading decreased the quantum yield (QY) of the wrinkled silica-QD hybrid particles. Compared to the previously-reported silica-QD hybrid particles, the wrinkled silica-QD hybrid particles exhibited higher QY, because the QD surfaces were not chemically modified during the hybridization process. The hybrid particles and free QDs were then used to prepare QD/photoresist nanocomposites. Since photoresist resin contains non-solvent for QDs, nanocomposites containing free QDs showed noteworthy aggregation even at 1.5 wt%, which resulted in deteriorated efficiency and stability. However, we were able to fabricate QD/photoresist nanocomposites successfully using hybrid particles up to 30 wt%, as the wrinkled silica nanoparticles helped in the dispersion of the QDs. By varying the concentration of hybrid particles in the nanocomposites, we found that the hybrid particles at 20 wt% exhibited the highest quantum efficiency. Testing of wrinkled silica/photoresist nanocomposites (without QDs), fabricated with different concentrations of the wrinkled silica nanoparticles, revealed that the highest efficiency at 20 wt% hybrid particles was the result of enhanced scattering by the wrinkled silica nanoparticles. Finally, simple devices in which hybrid particles were placed on blue µ-LEDs were fabricated, and their luminescence properties were analyzed.

Original languageEnglish
Pages (from-to)109-115
Number of pages7
JournalChemical Engineering Journal
Volume369
DOIs
Publication statusPublished - 2019 Aug 1

Fingerprint

Photoresists
Silicon Dioxide
Semiconductor quantum dots
Nanocomposites
silica
Silica
Nanoparticles
Quantum yield
particle
luminescence
resin
Quantum efficiency
scattering
Light emitting diodes
Luminescence
Agglomeration
Resins
nanoparticle
Scattering

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

@article{431bbd034c204f2882df5247bf60937a,
title = "Enhancing efficiency of quantum dot/photoresist nanocomposite using wrinkled silica-quantum dot hybrid particles",
abstract = "We have synthesized hybrid particles by embedding CdSe/ZnS quantum dots (QDs) into wrinkled silica nanoparticles. We found that increasing the QD loading decreased the quantum yield (QY) of the wrinkled silica-QD hybrid particles. Compared to the previously-reported silica-QD hybrid particles, the wrinkled silica-QD hybrid particles exhibited higher QY, because the QD surfaces were not chemically modified during the hybridization process. The hybrid particles and free QDs were then used to prepare QD/photoresist nanocomposites. Since photoresist resin contains non-solvent for QDs, nanocomposites containing free QDs showed noteworthy aggregation even at 1.5 wt{\%}, which resulted in deteriorated efficiency and stability. However, we were able to fabricate QD/photoresist nanocomposites successfully using hybrid particles up to 30 wt{\%}, as the wrinkled silica nanoparticles helped in the dispersion of the QDs. By varying the concentration of hybrid particles in the nanocomposites, we found that the hybrid particles at 20 wt{\%} exhibited the highest quantum efficiency. Testing of wrinkled silica/photoresist nanocomposites (without QDs), fabricated with different concentrations of the wrinkled silica nanoparticles, revealed that the highest efficiency at 20 wt{\%} hybrid particles was the result of enhanced scattering by the wrinkled silica nanoparticles. Finally, simple devices in which hybrid particles were placed on blue µ-LEDs were fabricated, and their luminescence properties were analyzed.",
author = "Kiju Um and Kim, {Hyo Jun} and Jo, {Joon Hee} and Hyungjoon Jeon and Yang, {Hye Bin} and Kim, {Young Joo} and Kangtaek Lee",
year = "2019",
month = "8",
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doi = "10.1016/j.cej.2019.03.039",
language = "English",
volume = "369",
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journal = "Chemical Engineering Journal",
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Enhancing efficiency of quantum dot/photoresist nanocomposite using wrinkled silica-quantum dot hybrid particles. / Um, Kiju; Kim, Hyo Jun; Jo, Joon Hee; Jeon, Hyungjoon; Yang, Hye Bin; Kim, Young Joo; Lee, Kangtaek.

In: Chemical Engineering Journal, Vol. 369, 01.08.2019, p. 109-115.

Research output: Contribution to journalArticle

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T1 - Enhancing efficiency of quantum dot/photoresist nanocomposite using wrinkled silica-quantum dot hybrid particles

AU - Um, Kiju

AU - Kim, Hyo Jun

AU - Jo, Joon Hee

AU - Jeon, Hyungjoon

AU - Yang, Hye Bin

AU - Kim, Young Joo

AU - Lee, Kangtaek

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N2 - We have synthesized hybrid particles by embedding CdSe/ZnS quantum dots (QDs) into wrinkled silica nanoparticles. We found that increasing the QD loading decreased the quantum yield (QY) of the wrinkled silica-QD hybrid particles. Compared to the previously-reported silica-QD hybrid particles, the wrinkled silica-QD hybrid particles exhibited higher QY, because the QD surfaces were not chemically modified during the hybridization process. The hybrid particles and free QDs were then used to prepare QD/photoresist nanocomposites. Since photoresist resin contains non-solvent for QDs, nanocomposites containing free QDs showed noteworthy aggregation even at 1.5 wt%, which resulted in deteriorated efficiency and stability. However, we were able to fabricate QD/photoresist nanocomposites successfully using hybrid particles up to 30 wt%, as the wrinkled silica nanoparticles helped in the dispersion of the QDs. By varying the concentration of hybrid particles in the nanocomposites, we found that the hybrid particles at 20 wt% exhibited the highest quantum efficiency. Testing of wrinkled silica/photoresist nanocomposites (without QDs), fabricated with different concentrations of the wrinkled silica nanoparticles, revealed that the highest efficiency at 20 wt% hybrid particles was the result of enhanced scattering by the wrinkled silica nanoparticles. Finally, simple devices in which hybrid particles were placed on blue µ-LEDs were fabricated, and their luminescence properties were analyzed.

AB - We have synthesized hybrid particles by embedding CdSe/ZnS quantum dots (QDs) into wrinkled silica nanoparticles. We found that increasing the QD loading decreased the quantum yield (QY) of the wrinkled silica-QD hybrid particles. Compared to the previously-reported silica-QD hybrid particles, the wrinkled silica-QD hybrid particles exhibited higher QY, because the QD surfaces were not chemically modified during the hybridization process. The hybrid particles and free QDs were then used to prepare QD/photoresist nanocomposites. Since photoresist resin contains non-solvent for QDs, nanocomposites containing free QDs showed noteworthy aggregation even at 1.5 wt%, which resulted in deteriorated efficiency and stability. However, we were able to fabricate QD/photoresist nanocomposites successfully using hybrid particles up to 30 wt%, as the wrinkled silica nanoparticles helped in the dispersion of the QDs. By varying the concentration of hybrid particles in the nanocomposites, we found that the hybrid particles at 20 wt% exhibited the highest quantum efficiency. Testing of wrinkled silica/photoresist nanocomposites (without QDs), fabricated with different concentrations of the wrinkled silica nanoparticles, revealed that the highest efficiency at 20 wt% hybrid particles was the result of enhanced scattering by the wrinkled silica nanoparticles. Finally, simple devices in which hybrid particles were placed on blue µ-LEDs were fabricated, and their luminescence properties were analyzed.

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