Plasmonic Absorption Enhancement in a Dye-Sensitized Solar Cell Using a Fourier Harmonics Grating

Mahmoud R.M. Atalla

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A solid-state dye-sensitized solar cell with back-contact Fourier harmonics (FH) grating was studied theoretically, using the rigorous coupled-wave analysis. The FH grating was found to provide enhanced absorptance and enable efficient multiple surface–plasmon–polariton (SPP) wave excitations. The incident plane wave was considered to be TM-polarized with oblique incidence. The FH gratings were designed to excite multiple SPP waves at desirable wavelengths by solving a canonical boundary value problem. The excitation of SPP waves is indicated by the presence of peaks in the absorptance plots. The FH grating enables light trapping corresponding to the wave vectors of the constituting simple gratings, which may be useful for chemical sensing and communication applications as well.

Original languageEnglish (US)
Pages (from-to)151-156
Number of pages6
JournalPlasmonics
Volume10
Issue number1
DOIs
StatePublished - Feb 2014

Bibliographical note

Funding Information:
In this study, an SDSC with back-contact FH grating has been studied theoretically, and the absorptance peaks which indicate the excitation of SPP waves in the simple and FH grating-coupled configurations were identified; confirmation from the P(x, z) and ∣ E (x, z)∣ was obtained. The following notes can be drawn: (i) from the canonical problem, generally, the low-phase speed SPP wave solution is associated with high localization to the metal-/spiro-MeOTAD interface, (ii) all the excited SPP waves by the stand alone simple gratings, or the corresponding FH gratings, were less than 5 nm apart from the wavelengths predicted by the canonical problem, (iii) carefully designed FH gratings surpass the stand-alone simple gratings in terms of absorptance, (iv) the FH gratings have proven to have fairly high excitation efficiency compared to the constituent simple gratings, and they are easy to fabricate as well [, ]. This holds high potential for practical applications in communications [], chemical sensing [, ], and multilayer solar cells [, ]. The author would like to thank the Egyptian Ministry of Higher Education for supporting his research activities. x 2

Publisher Copyright:
© 2014, Springer Science+Business Media New York.

Keywords

  • Dye-sensitized solar cell
  • Gratings
  • Surface plasmons
  • Surface waves

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