Optimized design of moth eye antireflection structure for organic photovoltaics

Shigeru Kubota, Kensaku Kanomata, Bashir Ahmmad, Jun Mizuno, Fumihiko Hirose

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

To improve the power conversion efficacy of organic photovoltaics (OPVs), it is required to design antireflection structures that could realize efficient and broadband light trapping. In this article, we perform global optimization of the textured pattern of moth eye antireflection surfaces to maximize the short-circuit current density (JSC) of OPVs with a poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)-based bulk heterojunction. We introduce an optimization algorithm consisting of two steps: in the first step, the simple grid search is conducted to roughly estimate a globally optimal solution, while in the second step, the Hooke and Jeeves pattern search is executed to refine the solution. By combining the optimization algorithm with the optical simulation based on the finite-difference time-domain method, we find the optimal period and height of moth eye array with which the level of JSC can be increased by 9.05% in the P3HT:PCBM-based organic solar cell. We also demonstrate that the optimized moth eye structure can significantly modify the light path at a long wavelength range to strengthen the electric field intensity and enhance energy absorption within the active layer.

Original languageEnglish
Pages (from-to)201-210
Number of pages10
JournalJournal of Coatings Technology Research
Volume13
Issue number1
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

moths
Butyric acid
Esters
butyric acid
optimization
Butyric Acid
esters
Finite difference time domain method
Energy absorption
Global optimization
Short circuit currents
Heterojunctions
Current density
Electric fields
energy absorption
short circuit currents
finite difference time domain method
Wavelength
heterojunctions
solar cells

Keywords

  • FDTD
  • Moth eye
  • Optimization
  • Organic solar cell

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Optimized design of moth eye antireflection structure for organic photovoltaics. / Kubota, Shigeru; Kanomata, Kensaku; Ahmmad, Bashir; Mizuno, Jun; Hirose, Fumihiko.

In: Journal of Coatings Technology Research, Vol. 13, No. 1, 01.01.2016, p. 201-210.

Research output: Contribution to journalArticle

Kubota, Shigeru ; Kanomata, Kensaku ; Ahmmad, Bashir ; Mizuno, Jun ; Hirose, Fumihiko. / Optimized design of moth eye antireflection structure for organic photovoltaics. In: Journal of Coatings Technology Research. 2016 ; Vol. 13, No. 1. pp. 201-210.
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