Thermal behavior of a quantum dot nanocomposite as a color converting material and its application to white LED

Ju Yeon Woo, Kyung Nam Kim, Sohee Jeong, Chang Soo Han

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

We present a novel nanocomposite, a mixture of a CdSe/CdS/ZnS red quantum dot (QD), an Sr2SiO4:Eu green phosphor and silicone resin for a color converting material. The temperature rise and the optical characteristics of the nanocomposite due to the addition of the QD have been investigated in terms of QD content ratio and the mixing components. The experimental results suggested that a small addition of QDs generated a large amount of heat during light conversion at the wavelength of QD emission. Considering the temperature rise in a nanocomposite, we applied 0.2 wt% QDs on an InGaN blue LED chip. As a result, we could achieve a white LED device with a high color rendering index of 83.2, a high luminance of 65.86 lm W-1 and a moderate temperature increase of 94 °C. The white LED converted by the newly developed QD-phosphor nanocomposite has great potential in future illumination.

Original languageEnglish
Article number495704
JournalNanotechnology
Volume21
Issue number49
DOIs
Publication statusPublished - 2010 Dec 10

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Thermal behavior of a quantum dot nanocomposite as a color converting material and its application to white LED'. Together they form a unique fingerprint.

  • Cite this