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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S2 — Mar. 10, 2014
  • pp: A425–A437

A study on the optics of copper indium gallium (di)selenide (CIGS) solar cells with ultra-thin absorber layers

Man Xu, Arthur J. H. Wachters, Joop van Deelen, Maurice C. D. Mourad, and Pascal J. P. Buskens  »View Author Affiliations

Optics Express, Vol. 22, Issue S2, pp. A425-A437 (2014)

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We present a systematic study of the effect of variation of the zinc oxide (ZnO) and copper indium gallium (di)selenide (CIGS) layer thickness on the absorption characteristics of CIGS solar cells using a simulation program based on finite element method (FEM). We show that the absorption in the CIGS layer does not decrease monotonically with its layer thickness due to interference effects. Ergo, high precision is required in the CIGS production process, especially when using ultra-thin absorber layers, to accurately realize the required thickness of the ZnO, cadmium sulfide (CdS) and CIGS layer. We show that patterning the ZnO window layer can strongly suppress these interference effects allowing a higher tolerance in the production process.

© 2014 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(160.6000) Materials : Semiconductor materials
(230.4170) Optical devices : Multilayers
(310.6860) Thin films : Thin films, optical properties
(350.6050) Other areas of optics : Solar energy
(310.4165) Thin films : Multilayer design
(310.6845) Thin films : Thin film devices and applications

ToC Category:
Light Trapping for Photovoltaics

Original Manuscript: September 30, 2013
Revised Manuscript: January 10, 2014
Manuscript Accepted: February 3, 2014
Published: February 21, 2014

Man Xu, Arthur J. H. Wachters, Joop van Deelen, Maurice C. D. Mourad, and Pascal J. P. Buskens, "A study on the optics of copper indium gallium (di)selenide (CIGS) solar cells with ultra-thin absorber layers," Opt. Express 22, A425-A437 (2014)

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