Hollow-core polymeric nanoparticles for the enhancement of OLED outcoupling efficiency

Abstract This work presents the possibility of the hollow core nanoparticles to improve luminance in an organic light emitting diode device. The finite difference time domain simulation estimates the effect of the hollow core nanoparticles on the external quantum efficiency of the organic light emitting diode device. The efficiency depends on the size and the volume fraction of the hollow core nanoparticles in the polymer layer, together with the refractive index and the thickness of the polymer layer. It is shown that the hollow core nanoparticles dispersed in a polymer layer can enhance the external quantum efficiency by a factor of 2.5. This work also introduces a continuous production method of the hollow core nanoparticles by using the microfluidic self-assembly of amphiphilic polymers and the layer formation dispersed with them for the rigorous light scattering.

[1]  P. Fowler,et al.  Visible Mie Scattering from Hollow Silica Particles with Particulate Shells , 2014 .

[2]  Stephen R. Forrest,et al.  Enhanced light out-coupling of organic light-emitting devices using embedded low-index grids , 2008 .

[3]  Eunju Kim,et al.  Direct synthesis of polymer nanocapsules: self-assembly of polymer hollow spheres through irreversible covalent bond formation. , 2010, Journal of the American Chemical Society.

[4]  Hyung Hoon Kim,et al.  Continuous and surfactant-free preparation of nanocapsulized proteins , 2012 .

[5]  Min-Cheol Oh,et al.  FDTD analysis of the light extraction efficiency of OLEDs with a random scattering layer. , 2014, Optics express.

[6]  Min-Cheol Oh,et al.  Outcoupling Enhancement of OLEDs With a Randomly Distributed ITO Pattern Fabricated by Maskless Wet Etching Method , 2013, Journal of Display Technology.

[7]  G. Riess,et al.  Micellization of block copolymers , 2003 .

[8]  Yong-Hee Lee,et al.  Planarized SiNx/spin-on-glass photonic crystal organic light-emitting diodes , 2006 .

[9]  Soon Moon Jeong,et al.  Light extraction from organic light-emitting diodes enhanced by spontaneously formed buckles , 2010 .

[10]  Stephen R. Forrest,et al.  Weak microcavity effects in organic light-emitting devices , 1998 .

[11]  P. Wakeley,et al.  Synthesis , 2013, The Role of Animals in Emerging Viral Diseases.

[12]  S. A. Dergunov,et al.  Synthesis, Characterization, and Long-Term Stability of Hollow Polymer Nanocapsules with Nanometer-Thin Walls. , 2010, Macromolecules.

[13]  Dae-Geun Choi,et al.  Ultraviolet nanoimprinted polymer nanostructure for organic light emitting diode application , 2008 .

[14]  Malte C. Gather,et al.  Nano-particle based scattering layers for optical efficiency enhancement of organic light-emitting diodes and organic solar cells , 2013 .

[15]  Christian F. Chamberlayne,et al.  Direct synthesis of hollow polymeric nanocapsules of variable shell thickness and rigidity , 2013 .

[16]  J. Go,et al.  Synthesis fluorescent magnetic nanoparticles in a microchannel using the La Mer process and the characterization of their properties , 2014, Journal of Materials Science.

[17]  Jeung Sang Go,et al.  Microfluidics assisted synthesis of well-defined spherical polymeric microcapsules and their utilization as potential encapsulants. , 2006, Lab on a chip.

[18]  J. Sturm,et al.  Optimization of external coupling and light emission in organic light-emitting devices: modeling and experiment , 2002 .