title: Incorporation of nanovoids into metallic gratings for broadband plasmonic organic solar cells.
abstract: We present investigation and optimization of a newly proposed plasmonic organic solar cell geometry based on the incorporation of nanovoids into conventional rectangular backplane gratings. Hybridization of strongly localized plasmonic modes of the nanovoids with Fabry-Perot cavity modes originating from surface plasmon reflection at the grating elements is shown to significantly boost performance in the long wavelength regime. This constitutes improved broadband operation while maintaining absorption enhancements at short wavelengths derived from conventional rectangular grating. Our calculations predict a figure of merit enhancement of up to 41% compared to when the nanovoid indented grating is absent. This is a significant improvement over the previously considered rectangular grating structures, which is further shown to be maintained over the entire angular range.
authors.affiliation: Photonic Systems Laboratory, School of EECS, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Sangjun
authors.initials: S
authors.lastname: Lee
authors.forename: Sungjun
authors.initials: S
authors.lastname: In
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Mason
authors.forename: Namkyoo
authors.initials: N
authors.lastname: Park
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D011211:Electric Power Supplies; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008962:Models, Theoretical; D009930:Organic Chemicals / Q000737:chemistry*; D012993:Solar Energy; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D009930:Organic Chemicals