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Zhao B, Yao Y, Gao M, et al. Doped quantum dot@silica nanocomposites for white light-emitting diodes. Nanoscale. 2015;7(41):17231-6doi: 10.1039/c5nr04839g.
Zhao, B., Yao, Y., Gao, M., Sun, K., Zhang, J., & Li, W. (2015). Doped quantum dot@silica nanocomposites for white light-emitting diodes. Nanoscale, 7(41), 17231-6. https://doi.org/10.1039/c5nr04839g
Zhao, Bingxia, et al. "Doped quantum dot@silica nanocomposites for white light-emitting diodes." Nanoscale vol. 7,41 (2015): 17231-6. doi: https://doi.org/10.1039/c5nr04839g
Zhao B, Yao Y, Gao M, Sun K, Zhang J, Li W. Doped quantum dot@silica nanocomposites for white light-emitting diodes. Nanoscale. 2015 Nov 07;7(41):17231-6. doi: 10.1039/c5nr04839g. PMID: 26372169.
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Nanoscale. 2015 Nov 07;7(41):17231-6. doi: 10.1039/c5nr04839g.

Doped quantum dot@silica nanocomposites for white light-emitting diodes.

Nanoscale

Bingxia Zhao, Yulian Yao, Mengyu Gao, Kang Sun, Jianhua Zhang, Wanwan Li

Affiliations

  1. State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China. [email protected] [email protected].

PMID: 26372169 DOI: 10.1039/c5nr04839g

Abstract

This work reports the use of a near-UV-LED chip in combination with blue, green-yellow and red emitting doped ZnSe QD@silica nanocomposites to construct a novel WLED with reduced scattering and no reabsorption. Blue, green-yellow and red emitting Cu or Mn doped ZnSe QDs with enlarged Stokes shifts and similar absorption peaks (360-410 nm) were synthesized in liquid paraffin in order to solve the reabsorption problem and also obtain balanced white emission spectra. Silica shells were then coated onto the doped QDs, allowing for the refractive index of the nanocomposites to be tailored while simultaneously improving their compatibility with the epoxy resin. The transparent doped ZnSe QD@SiO2/epoxy composite was then used as a light conversion and encapsulant material in combination with the near-UV-LED chip to fabricate the WLED. This fabricated WLED demonstrated high luminous efficiency and good color chromatics stability, suggesting that WLEDs based on highly fluorescent doped ZnSe QD@silica nanocomposites in combination with near-UV-LED chips may prove to be promising candidates for alternative light sources.

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