We investigated surface plasmon-waveguide hybrid resonances for enhancement of light emission in polymer light-emitting diodes (PLEDs). Hybrid waveguide-plasmon resonances in the visible range for waveguide mode and near IR range for surface plasmons were observed by incorporation of hexagonal Ag dot arrays. Considerable overlap between the emission wavelength of the PLEDs and the waveguide mode by an Ag dot array with a lattice constant of 500 nm was observed. Because of enhanced light extraction by Bragg scattering of waveguide modes, photoluminescence (PL) and electroluminescence (EL) were increased by 70% and 50%, respectively.
© 2012 Optical Society of America
Original Manuscript: October 14, 2011
Revised Manuscript: December 7, 2011
Manuscript Accepted: December 7, 2011
Published: February 17, 2012
Kwan Hyun Cho, Jin Yeong Kim, Dae-Geun Choi, Ki-Jung Lee, Jun-Hyuk Choi, and Kyung Cheol Choi, "Surface plasmon-waveguide hybrid polymer light-emitting devices using hexagonal Ag dots," Opt. Lett. 37, 761-763 (2012)