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III–V on Silicon Tandems (PP3.2)

PP3.2: III–V on Silicon Tandems

The aim of this package is to leverage Australia’s strengths in silicon-based solar research and to work with partners whose world-leading expertise on tandem solar cells and their complementary fabrication and characterization capabilities, to provide synergies for the development of a new generation of silicon wafer cell technologies.

By stacking top cells on silicon, the inherent efficiency advantages of tandem cell designs can be harnessed to substantially improve on current silicon performance through the addition of thin layers of high-performance materials.


The III-V materials system is one of the promising top cell candidates, with a proven track record of high-performance, long-term stability, and an existing deep knowledge base in terms of material properties and fabrication techniques. The major ways that III-V/silicon tandem cells can be realised are through direct growth, wafer bonding, mechanical stacking and spectrum splitting approaches.

PP3.2.1 Direct Growth

PP3.2.2  Mechanically Stacked III-V on Silicon Tandem Cells

PP3.2.3 Spectrum Splitting

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