285693 Enhancing Photoluminescence Intensity of Quantum Dots in Polymer Matrix by Using Hollow Silica Particles
Enhancing photoluminescence intensity of quantum dots in polymer matrix by using hollow silica particles
Hyun Chang Kim1, Taegyeong Kang1, Cheolsang Yoon1, Hyun-Guk Hong2, Young-Joo Kim2, and Kangtaek Lee1
1Department of Chemical and Biomolecular Engineering, Yonsei University
2Department of Mechanical Engineering, Yonsei University
Achieving high photoluminescence intensity of quantum dots in polymer matrix is of interest in display field. In this study, we improve dispersion of quantum dots in polymer matrix, and subsequently enhance the photoluminescence intensity by encapsulating a homogeneous quantum dot layer at a radial equidistance on silica nanoparticle. Previous studies on encapsulation of quantum dots on silica nanoparticle were conducted in aqueous phase, which exhibited substantially lower photoluminescence intensity and stability than in organic phase. A new method of encapsulating quantum dots from organic phase onto silica particles is introduced, and to further increase the photoluminescence intensity, hollow silica nanoparticles are used. Hollow silica particles have higher transparency than silica particles, and should increase the photoluminescence intensity of the encapsulating quantum dots more significantly due to their unique near field optics and light trapping properties.
Keywords: Materials, Nanotechnology, Hollow Silica, Polymer Film, and Quantum dot