21 / 48
Page 77
Notes:
conferenceseries
.com
November 13-15, 2017 | Las Vegas, USA
14
th
International Conference and Exhibition on
Materials Science and Engineering
RRJOMS | Volume 5 | Issue 7 | November, 2017
Scattering and plasmonic phenomena of nanoparticle self-assembled arrays in the thin-film organic
lighting devices and photovoltaics
Ohyoung Kim, Sung min Jo, Mei Meng, Byung Doo Chin, Dong-Eun Lee
and
Dong Hyun Lee
Dankook University, Korea
T
he approach using localized surface plasmon resonance (LSPR) from metallic nanoparticles is attractive as one of the promising
method to enhance the internal quantum efficiency of an organic light emitting diode (OLED) or power conversion efficiency of
an organic solar cell (OSC), where the various shapes and geometrical arrangements of the nanoparticle and the nanostructures affects
their performances. LSPR increases electromagnetic density of states which contribute to more efficient light emission of OLEDs. In
order to investigate the light extraction from metallic nanoparticle array, we have compared the monodispersed silver nanoparticles
(randomly dispersed onto substrates by spin-coating) with the ordered gold metallic arrays (formed by the phase separation of block
copolymer; BCP). Gold nanoparticles arrays were given a particular morphology, which is driven by self-assembly of polystyrene-
block-poly (2-vinyl pyridine) BCP thin film by solvent-annealing process. Controlling the annealing time and solvent type of the
block copolymer results in the various nano-morphologies. In case of OLED, light emission efficiency (internal quantum yield) shows
notable improvement (about 43.8%) in terms of current efficiency for line patterns of Au nanoparticles array developed by BCP self-
assembly. Those plasmonic nanostructures of gold were almost similar scales of BCP patterns, formed at the on the surface of anode
(ITO) at both OLED and OSC, showing notable enhancements of the light extraction and power conversion efficiency. The size and
the anisotropy of gold nano-patterns were changed from a simple dispersion of dot through an integrated dot-line pattern, finally to
a contour line pattern with higher percolation of particle array.
Biography
Prof. Ohyoung Kim has expertise in biomedical polymer, environmental-friendly polymer as well as various functional nanomaterials and polymers for electronic application.
He received his B.S. and M.S. degree at Seoul National Univ., and Ph.D. degree from Univ. of Massachusetts at Lowell (polymer science). From 1997, he has been served
as a professor at department of polymer science and engineering, Dankook University, Gyeonggi, Korea, with special contributions as a head of industry-university coop-
eration foundation, office of planning, and secretary’s office of President of Dankook University. He is currently a dean of faculty for college of engineering and graduate
school of information technology & intellectual property.
koybon@dankook.ac.krOhyoung Kim et al., Res. Rev. J Mat. Sci. 2017, 5:7
DOI: 10.4172/2321-6212-C1-012