Computational investigation of silicon thin-film solar cells with grating structures fabricated by holographic lithography

Martin Theuring; Jürgen Lacombe; Kambulakwao Chakanga; Ruben Hünig; Klaus Huska; Martin Vehse; Karsten von Maydell; Uli Lemmer; Carsten Agert

doi:10.1117/12.921799

2 May 2012 Computational investigation of silicon thin-film solar cells with grating structures fabricated by holographic lithography

Martin Theuring, Jürgen Lacombe, Kambulakwao Chakanga, Ruben Hünig, Klaus Huska, Martin Vehse, Karsten von Maydell, Uli Lemmer, Carsten Agert

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Proceedings Volume 8438, Photonics for Solar Energy Systems IV; 84381Q (2012) https://doi.org/10.1117/12.921799
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

Light trapping due to rough interfaces is a common and industrially applied technique to enhance cell performance in silicon thin-film solar cells. The induced scattering enhances the absorption and consequently the conversion efficiency of the device. Periodic structures promise to further enhance the light trapping, allowing a beneficial reduction of the absorber layer thickness. In this work, solar cells with transparent front contacts with a two-dimensional (2D) grating structure produced by holographic lithography are investigated. The grating structures are characterized by various means and the results are used to calibrate finite-difference time-domain (FDTD) simulations. With the computational method, the influence of the grating height on the solar cell performance is investigated.

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Martin Theuring, Jürgen Lacombe, Kambulakwao Chakanga, Ruben Hünig, Klaus Huska, Martin Vehse, Karsten von Maydell, Uli Lemmer, and Carsten Agert "Computational investigation of silicon thin-film solar cells with grating structures fabricated by holographic lithography", Proc. SPIE 8438, Photonics for Solar Energy Systems IV, 84381Q (2 May 2012); https://doi.org/10.1117/12.921799

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KEYWORDS

Solar cells

Absorption

Reflectivity

Finite-difference time-domain method

Glasses

Holography

Lithography

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