Efficiency improvement in organic solar cells with nano-structured ITO electrodes

Chenguang D. Wang, Martin J. Cryan

Research output: Contribution to journalArticle (Academic Journal)

3 Citations (Scopus)

Abstract

In this paper we use the finite difference time domain (FDTD) method to show that the efficiency of an organic photovoltaic cell can be significantly improved by nanostructuring the indium tin oxide (ITO) layer with 2D periodic arrays of holes. With air filling of the ITO structure, the number of absorbed photons is increased by 24.8% and the absorptance is increased by 22.1%. This paper also assesses the effect of allowing the adjacent poly(3, 4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) layer to the fill the grating, in which case lower enhancements are found of 7.5% and 8.6% respectively. Finally, low-loss dielectric filling using poly(methyl methacrylate) (PMMA) is assessed, and enhancements of 15% and 16% are found.

Original languageEnglish
Article number065901
JournalJournal of Optics
Volume17
Issue number6
DOIs
Publication statusPublished - 1 Jun 2015

Keywords

  • diffraction gratings
  • FDTD method
  • nano structures
  • organic photovoltaic

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