title: Broadband short-range surface plasmon structures for absorption enhancement in organic photovoltaics.
abstract: We theoretically demonstrate a polarization-independent nanopatterned ultra-thin metallic structure supporting short-range surface plasmon polariton (SRSPP) modes to improve the performance of organic solar cells. The physical mechanism and the mode distribution of the SRSPP excited in the cell device were analyzed, and reveal that the SRSPP-assisted broadband absorption enhancement peak could be tuned by tailoring the parameters of the nanopatterned metallic structure. Three-dimensional finite-difference time domain calculations show that this plasmonic structure can enhance the optical absorption of polymer-based photovoltaics by 39% to 112%, depending on the nature of the active layer (corresponding to an enhancement in short-circuit current density by 47% to 130%). These results are promising for the design of organic photovoltaics with enhanced performance.
authors.affiliation: Electrical and Computer Engineering Department, Lehigh University, Bethlehem, PA 18015, USA.
authors.forename: Wenli
authors.initials: W
authors.lastname: Bai
authors.forename: Qiaoqiang
authors.initials: Q
authors.lastname: Gan
authors.forename: Guofeng
authors.initials: G
authors.lastname: Song
authors.forename: Lianghui
authors.initials: L
authors.lastname: Chen
authors.forename: Zakya
authors.initials: Z
authors.lastname: Kafafi
authors.forename: Filbert
authors.initials: F
authors.lastname: Bartoli