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Nanocrystalline Y3Al5O12:Ce phosphor-based white light-emitting diodes embedded with CdS:Mn/ZnS core/shell quantum dots
- Authors
- Kim, Jong-Uk; Kim, Yong-Seog; Yang, Heesun
- Issue Date
- 15-Mar-2009
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Nanocrystalline Y3Al5O12:Ce; CdS:Mn/ZnS quantum dots; Color rendering index; White light emitting diodes
- Citation
- MATERIALS LETTERS, v.63, no.6-7, pp.614 - 616
- Journal Title
- MATERIALS LETTERS
- Volume
- 63
- Number
- 6-7
- Start Page
- 614
- End Page
- 616
- ISSN
- 0167-577X
- Abstract
- 120 nm-sized yellow emitting Y3Al5O12:Ce (YAG:Ce) nanocrystalline phosphors and 4.5 nm-sized orange emitting CdS:Mn/ZnS core/shell structured quantum dots (QDs) were prepared by a modified polyol and a reverse micelle chemistry, respectively. To compensate a poor color rendering index (CRI) of YAG:Ce nanophosphor-based white light-emitting diodes (LEDs) due to the lack of red spectral component, CdS:Mn/ ZnS QDs were blended into YAG:Ce nanophosphors. Blends of nanophosphors and QDs exhibited the prominent spectral evolution with an increasing content of QDs. A hybrid white LED, which combines a blue LED with the blend of nanophosphor and QDs with a weight ratio of 1:1 was demonstrated with an improved CRI value of 85. (C) 2008 Elsevier B.V. All rights reserved.
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Related Researcher
- Yang, Hee sun
- Graduate School (Department of Materials Science and Engineering)