Thermal stabilities of cadmium selenide and cadmium-free quantum dots in quantum dot-silicone nanocomposites

Taewoo Kim, Cheolsang Yoon, Young Geon Song, Young-Joo Kim, Kangtaek Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

To investigate the thermal stabilities of CdSe and Cd-free quantum dots (QDs) in QD-silicone polymer nanocomposites, we synthesized both CdSe and CuInS2 (CIS) QDs capped with different surface ligands (oleic acid (OA) and 1-dodecanethiol (1-DDT)). A comparison of the quantum yields of dried QDs after exposure to different temperatures revealed that the CIS QDs and 1-DDT ligands exhibited higher thermal stabilities than the CdSe QDs and OA ligands, respectively. We also prepared QD-silicone nanocomposites containing different types of QDs by varying the curing temperature and time and observed that nanocomposites containing CdSe QDs exhibited discoloration at high temperatures, whereas those containing CIS QDs did not. Moreover, the highest quantum efficiency (QE) of the QD-silicone nanocomposites was observed in the case of CIS QDs capped with 1-DDT and the lowest was observed in the case of CdSe QDs capped with OA. Because the dispersion states of QDs were not substantially affected at high temperatures, we attributed the high QE of nanocomposites containing the CIS QDs capped with 1-DDT to the superior thermal stability of CIS QDs and their surface ligand (i.e., 1-DDT).

Original languageEnglish
Pages (from-to)54-58
Number of pages5
JournalJournal of Luminescence
Volume177
DOIs
Publication statusPublished - 2016 Sep 1

Fingerprint

cadmium selenides
Nanocomposites
Quantum Dots
silicones
Silicones
Cadmium
cadmium
Semiconductor quantum dots
nanocomposites
Thermodynamic stability
thermal stability
Hot Temperature
quantum dots
oleic acid
Oleic Acid
Ligands
ligands
Temperature
cadmium selenide
Quantum efficiency

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Biochemistry
  • Condensed Matter Physics

Cite this

@article{b1f7f065bd0b495fa20d47f67483793d,
title = "Thermal stabilities of cadmium selenide and cadmium-free quantum dots in quantum dot-silicone nanocomposites",
abstract = "To investigate the thermal stabilities of CdSe and Cd-free quantum dots (QDs) in QD-silicone polymer nanocomposites, we synthesized both CdSe and CuInS2 (CIS) QDs capped with different surface ligands (oleic acid (OA) and 1-dodecanethiol (1-DDT)). A comparison of the quantum yields of dried QDs after exposure to different temperatures revealed that the CIS QDs and 1-DDT ligands exhibited higher thermal stabilities than the CdSe QDs and OA ligands, respectively. We also prepared QD-silicone nanocomposites containing different types of QDs by varying the curing temperature and time and observed that nanocomposites containing CdSe QDs exhibited discoloration at high temperatures, whereas those containing CIS QDs did not. Moreover, the highest quantum efficiency (QE) of the QD-silicone nanocomposites was observed in the case of CIS QDs capped with 1-DDT and the lowest was observed in the case of CdSe QDs capped with OA. Because the dispersion states of QDs were not substantially affected at high temperatures, we attributed the high QE of nanocomposites containing the CIS QDs capped with 1-DDT to the superior thermal stability of CIS QDs and their surface ligand (i.e., 1-DDT).",
author = "Taewoo Kim and Cheolsang Yoon and Song, {Young Geon} and Young-Joo Kim and Kangtaek Lee",
year = "2016",
month = "9",
day = "1",
doi = "10.1016/j.jlumin.2016.04.038",
language = "English",
volume = "177",
pages = "54--58",
journal = "Journal of Luminescence",
issn = "0022-2313",
publisher = "Elsevier",

}

Thermal stabilities of cadmium selenide and cadmium-free quantum dots in quantum dot-silicone nanocomposites. / Kim, Taewoo; Yoon, Cheolsang; Song, Young Geon; Kim, Young-Joo; Lee, Kangtaek.

In: Journal of Luminescence, Vol. 177, 01.09.2016, p. 54-58.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Thermal stabilities of cadmium selenide and cadmium-free quantum dots in quantum dot-silicone nanocomposites

AU - Kim, Taewoo

AU - Yoon, Cheolsang

AU - Song, Young Geon

AU - Kim, Young-Joo

AU - Lee, Kangtaek

PY - 2016/9/1

Y1 - 2016/9/1

N2 - To investigate the thermal stabilities of CdSe and Cd-free quantum dots (QDs) in QD-silicone polymer nanocomposites, we synthesized both CdSe and CuInS2 (CIS) QDs capped with different surface ligands (oleic acid (OA) and 1-dodecanethiol (1-DDT)). A comparison of the quantum yields of dried QDs after exposure to different temperatures revealed that the CIS QDs and 1-DDT ligands exhibited higher thermal stabilities than the CdSe QDs and OA ligands, respectively. We also prepared QD-silicone nanocomposites containing different types of QDs by varying the curing temperature and time and observed that nanocomposites containing CdSe QDs exhibited discoloration at high temperatures, whereas those containing CIS QDs did not. Moreover, the highest quantum efficiency (QE) of the QD-silicone nanocomposites was observed in the case of CIS QDs capped with 1-DDT and the lowest was observed in the case of CdSe QDs capped with OA. Because the dispersion states of QDs were not substantially affected at high temperatures, we attributed the high QE of nanocomposites containing the CIS QDs capped with 1-DDT to the superior thermal stability of CIS QDs and their surface ligand (i.e., 1-DDT).

AB - To investigate the thermal stabilities of CdSe and Cd-free quantum dots (QDs) in QD-silicone polymer nanocomposites, we synthesized both CdSe and CuInS2 (CIS) QDs capped with different surface ligands (oleic acid (OA) and 1-dodecanethiol (1-DDT)). A comparison of the quantum yields of dried QDs after exposure to different temperatures revealed that the CIS QDs and 1-DDT ligands exhibited higher thermal stabilities than the CdSe QDs and OA ligands, respectively. We also prepared QD-silicone nanocomposites containing different types of QDs by varying the curing temperature and time and observed that nanocomposites containing CdSe QDs exhibited discoloration at high temperatures, whereas those containing CIS QDs did not. Moreover, the highest quantum efficiency (QE) of the QD-silicone nanocomposites was observed in the case of CIS QDs capped with 1-DDT and the lowest was observed in the case of CdSe QDs capped with OA. Because the dispersion states of QDs were not substantially affected at high temperatures, we attributed the high QE of nanocomposites containing the CIS QDs capped with 1-DDT to the superior thermal stability of CIS QDs and their surface ligand (i.e., 1-DDT).

UR - http://www.scopus.com/inward/record.url?scp=84964723155&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84964723155&partnerID=8YFLogxK

U2 - 10.1016/j.jlumin.2016.04.038

DO - 10.1016/j.jlumin.2016.04.038

M3 - Article

AN - SCOPUS:84964723155

VL - 177

SP - 54

EP - 58

JO - Journal of Luminescence

JF - Journal of Luminescence

SN - 0022-2313

ER -