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  • tournet et al _ reviewed_manuscript__abstract

    Rights statement: 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

    Accepted author manuscript, 915 KB, PDF-document

    Embargo ends: 11/12/19

    Available under license: CC BY-NC-ND

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

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<mark>Journal publication date</mark>03/2019
<mark>Journal</mark>Solar Energy Materials and Solar Cells
Volume191
Number of pages7
Pages (from-to)444-450
Publication statusPublished
Early online date11/12/18
Original languageEnglish

Abstract

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.

Bibliographic note

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