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Proceedings Paper

Absorbing photonic crystals for mono-crystalline silicon thin film solar cells
Author(s): Xianqin Meng; Valerie Depauw; Guillaume Gomard; Ounsi El Daif; Christos Trompoukis; Emmanuel Drouard; Cécile Jamois; Alain Fave; Frederic Dross; Ivan Gordon; Christian Seassal
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Paper Abstract

In this paper, we present the integration of an absorbing photonic crystal within a monocrystalline silicon thin film solar cell stack. Optical simulations performed on a complete solar cell revealed that patterning the epitaxial monocrystalline silicon active layer as a 1D and 2D photonic crystal enabled to increase its integrated absorption by 38%rel and 50%rel in the whole 300-1100 nm range, compared to a similar but unpatterned stack. In order to fabricate such promising cells, a specific fabrication process based on holographic lithography, inductively coupled plasma etching and reactive ion etching has been developed and implemented to obtain such photonic crystal patterned solar cells. Optical measurements performed on the patterned stacks highlight the significant absorption enhancement, as expected by simulation. A more advanced structuration combining a front and a rear 1D binary photonic patterning with different periods is designed, enabling a 60%abs larger absorption in silicon.

Paper Details

Date Published: 25 April 2012
PDF: 9 pages
Proc. SPIE 8425, Photonic Crystal Materials and Devices X, 84250R (25 April 2012); doi: 10.1117/12.922428
Show Author Affiliations
Xianqin Meng, Univ. de Lyon, Institut des Nanotechnologies de Lyon, CNRS-INSA-ECL-UCBL (France)
Valerie Depauw, IMEC (Belgium)
Guillaume Gomard, Univ. de Lyon, Institut des Nanotechnologies de Lyon, CNRS-INSA-ECL-UCBL (France)
Ounsi El Daif, IMEC (Belgium)
Christos Trompoukis, IMEC (Belgium)
Emmanuel Drouard, Univ. de Lyon, Institut des Nanotechnologies de Lyon, CNRS-INSA-ECL-UCBL (France)
Cécile Jamois, Univ. de Lyon, Institut des Nanotechnologies de Lyon, CNRS-INSA-ECL-UCBL (France)
Alain Fave, Univ. de Lyon, Institut des Nanotechnologies de Lyon, CNRS-INSA-ECL-UCBL (France)
Frederic Dross, IMEC (Belgium)
Ivan Gordon, IMEC (Belgium)
Christian Seassal, Univ. de Lyon, Institut des Nanotechnologies de Lyon, CNRS-INSA-ECL-UCBL (France)


Published in SPIE Proceedings Vol. 8425:
Photonic Crystal Materials and Devices X
Hernán Ruy Míguez; Sergei G. Romanov; Lucio Claudio Andreani; Christian Seassal, Editor(s)

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