Open AccessOrganic photovoltaic cell in lateral-tandem configuration employing continuously-tuned microcavity sub-cells
Author(s) -
Changsoon Kim,
Jungsang Kim
Publication year - 2008
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.019987
Subject(s) - tandem , photovoltaic system , materials science , optics , organic solar cell , energy conversion efficiency , optoelectronics , resonance (particle physics) , wavelength , physics , ecology , particle physics , composite material , biology
We propose a lateral-tandem organic photovoltaic system consisting of a dispersive-focusing element and continuously-tuned, series-connected sub-cells. The proposed system overcomes the efficiency limitation of organic photovoltaic devices by spectral re-distribution of incoming solar photons and their delivery to the wavelength-matched, resonant sub-cells. By numerical simulations, we demonstrate that optical resonance in a microcavity sub-cell with a metal/organic multilayer/metal structure can be tuned over a broad spectrum by varying the thickness of the organic multilayer. We show that the power-conversion efficiency exceeding 18% can be obtained in a lateral-tandem system employing an ideal dispersive-focusing element and the microcavity sub-cells.