Quantum-dot-embedded colloidal polymeric particles for white light-emitting-diode with high color rendering index

Abstract

We report on the simple colloidal encapsulation of quantum dots into polymeric microspheres using oil-in-water emulsions, which was generated by ultrasound emulsification method. Poly(styrene-co-methylmethacrylate) and Cd(S, Se) or CdSe@ZnS nanoparticles were dissolved in toluene and emulsified into water with surfactant. Then, oil phase inside emulsions was slowly evaporated producing composite microspheres of polymer and quantum dots. Their size could be controlled well by either varying the concentration of polymers in emulsion phase or adjusting the size of emulsion droplets. Finally, quantum-dot-embedded polymeric microspheres were deposited on the blue LED chips which showed white colors with high value of color rendering index.

Preparation and performance of CdS-hyperbranched poly(arylene ether ketone) nanocomposite materials

“…These organic/inorganic nanocomposite materials have not only the good processability of polymeric materials but also the excellent optical, magnetic and electronic properties of inorganic nanocrystals. So, there are a great number of papers devoted to the preparation of quantum dots (QDs)-polymer nanocomposites [10][11][12][13]. They deal with different aspects of the synthesis, characterisation and application of these systems.…”