GaSb-based solar cells for multi-junction integration on Si substrates

Tournet, J. and Parola, S. and Vauthelin, A. and Montesdeoca Cardenes, D. and Soresi, S. and Martinez, F. and Lu, Q. and Cuminal, Y. and Carrington, P.J. and Décobert, J. and Krier, A. and Rouillard, Y. and Tournié, E. (2019) GaSb-based solar cells for multi-junction integration on Si substrates. Solar Energy Materials and Solar Cells, 191. pp. 444-450. ISSN 0927-0248

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We report on the first single-junction GaSb solar cell epitaxially grown on a Si substrate. A control stand-alone GaSb solar cell was primarily fabricated, which demonstrated a 5.90% efficiency (AM1.5G). The preparation, growth and manufacturing procedures were then adapted to create the GaSb-on-Si solar cell. The hybrid device resulted in a degraded efficiency for which comparison between experimental and simulated data revealed dominant non-radiative recombination processes. Material and electrical characterization also highlighted the impact of anti-phase domains and boundaries and threading dislocation density on the shunt resistance of the cell. Nevertheless, the GaSb-on-Si cell performance is close to recent results on the integration of GaSb solar cells on GaAs, despite a much larger lattice mismatch (12% vs 8%). Routes for improvement, concerning the material quality and cell structure, are proposed. This work lays the foundations of a GaSb-based multi-junction solar cell monolithically integrated on Si.

Item Type:
Journal Article
Journal or Publication Title:
Solar Energy Materials and Solar Cells
Additional Information:
This is the author’s version of a work that was accepted for publication in Solar Energy Materials and Solar Cells. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solar Energy Materials and Solar Cells, 191, 2019 DOI: 10.1016/j.solmat.2018.11.035
Uncontrolled Keywords:
?? surfaces, coatings and filmselectronic, optical and magnetic materialsrenewable energy, sustainability and the environment ??
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Deposited On:
19 Dec 2018 10:20
Last Modified:
05 Jun 2024 00:35