Issue 130, 2015

Silica-coated gradient alloy quantum dots with high luminescence for converter materials in white light-emitting diodes

Abstract

Hydrophobic gradient alloy quantum dots (QDs) were prepared through a facile organic route. The amphiphilic, non-ionic polymer (PVP) was absorbed onto the surface of QDs, and therefore, the PVP coated QD (QD@PVP) could be dispersible in both polar and non-polar solvents. The QD@PVP was dispersed in ethanol and tetraethyl orthosilicate (TEOS) was added with a basic catalyst in order to generate silica shell encapsulated QDs (QD@SiO2). We report a preparation method for QD@SiO2 that maintains their high luminescence and thermal- and photo-stability using dimethylamine (DMA) as a basic catalyst. White light-emitting-diodes (WLEDs) incorporating the QD@SiO2 exhibited good performance in terms of superior luminescence efficiency and high color purity.

Graphical abstract: Silica-coated gradient alloy quantum dots with high luminescence for converter materials in white light-emitting diodes

Supplementary files

Article information

Article type
Paper
Submitted
16 Nov 2015
Accepted
10 Dec 2015
First published
15 Dec 2015

RSC Adv., 2015,5, 107585-107590

Author version available

Silica-coated gradient alloy quantum dots with high luminescence for converter materials in white light-emitting diodes

H. Jung, Y. Kim, J. Cho, T. Yoon and J. Lee, RSC Adv., 2015, 5, 107585 DOI: 10.1039/C5RA24203G

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