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

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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 [email protected] 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.
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Keywords: COMPOSITE MICROSPHERES; EMULSIONS; QUANTUM DOTS; SELF-ASSEMBLY; WHITE LED

Document Type: Research Article

Publication date: September 1, 2013

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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