A transparent and luminescent epoxy nanocomposite containing CdSe QDs with amido group-functionalized ligands
- 8 August 2011
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 21 (35), 13276-13282
- https://doi.org/10.1039/c1jm11125f
Abstract
A highly transparent and luminescent CdSe quantum dot (QD)/epoxy nanocomposite was prepared by mixing amido-functionalized QDs with an epoxy matrix. The original oleic acid ligand on the QDs was replaced by thioglycolic acid, and then primary amine groups were introduced via a reaction between the carboxyl group of thioglycolic acid and Schiff’s base. The QDs with amido-functionalized ligands showed a better dispersibility and higher optical properties in the epoxy matrix. It was found that the nanocomposite filled with 0.3 wt% modified green light-emitting QDs had a similar transparency to the neat epoxy and twice the luminescence intensity of nanocomposite-filled 0.3 wt% original QDs. Moreover, a QD/epoxy nanocomposite, which could emit clear white light by combining the unabsorbed blue excitation light and the re-emitted yellow light, was successfully fabricated by following the same strategy. The as-prepared QD/epoxy nanocomposite has potential applications in encapsulating materials in light-emitting diode.Keywords
This publication has 26 references indexed in Scilit:
- Quantum Dot Light-Emitting Devices with Electroluminescence Tunable over the Entire Visible SpectrumNano Letters, 2009
- Quantum Dot Solar Cells. Semiconductor Nanocrystals as Light HarvestersThe Journal of Physical Chemistry C, 2008
- Significant Enhancements in the Fluorescence and Phosphorescence of ZnO Quantum Dots/SiO2 Nanocomposites by CalcinationThe Journal of Physical Chemistry C, 2008
- Facile Synthesis of Highly Transparent Polymer Nanocomposites by Introduction of Core–Shell Structured NanoparticlesChemistry of Materials, 2008
- White light emitting diodes realized by using an active packaging method with CdSe/ZnS quantum dots dispersed in photosensitive epoxy resinsNanotechnology, 2008
- Photoluminescence Switching of Charged Quantum Dot FilmsThe Journal of Physical Chemistry C, 2007
- Single Quantum Dot Nanowire LEDsNano Letters, 2007
- Quantum Dot Encapsulation in Viral CapsidsNano Letters, 2006
- Full Color Emission from II-VI Semiconductor Quantum Dot-Polymer CompositesAdvanced Materials, 2000
- Hybrid Nanocomposite Materials—between inorganic glasses and organic polymersAdvanced Materials, 1993