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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 3 — Jan. 30, 2012
  • pp: 2572–2580

Optical and electrical study of organic solar cells with a 2D grating anode

Wei E.I. Sha, Wallace C.H. Choy, Yumao Wu, and Weng Cho Chew  »View Author Affiliations

Optics Express, Vol. 20, Issue 3, pp. 2572-2580 (2012)

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We investigate both optical and electrical properties of organic solar cells (OSCs) incorporating 2D periodic metallic back grating as an anode. Using a unified finite-difference approach, the multiphysics modeling framework for plasmonic OSCs is established to seamlessly connect the photon absorption with carrier transport and collection by solving the Maxwell’s equations and semiconductor equations (Poisson, continuity, and drift-diffusion equations). Due to the excited surface plasmon resonance, the significantly nonuniform and extremely high exciton generation rate near the metallic grating are strongly confirmed by our theoretical model. Remarkably, the nonuniform exciton generation indeed does not induce more recombination loss or smaller open-circuit voltage compared to 1D multilayer standard OSC device. The increased open-circuit voltage and reduced recombination loss by the plasmonic OSC are attributed to direct hole collections at the metallic grating anode with a short transport path. The work provides an important multiphysics understanding for plasmonic organic photovoltaics.

© 2012 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(250.5403) Optoelectronics : Plasmonics
(310.6628) Thin films : Subwavelength structures, nanostructures
(310.6805) Thin films : Theory and design

ToC Category:
Solar Energy

Original Manuscript: November 23, 2011
Revised Manuscript: January 5, 2012
Manuscript Accepted: January 5, 2012
Published: January 20, 2012

Wei E.I. Sha, Wallace C.H. Choy, Yumao Wu, and Weng Cho Chew, "Optical and electrical study of organic solar cells with a 2D grating anode," Opt. Express 20, 2572-2580 (2012)

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