A micro-transfer printed high efficiency flexible photovoltaic panel

Semprius micro transfer-prints small high efficiency solarcells to produce very low weight, flexible, and weatherized solar panels. The micro-cell design is based on a conventional lattice matched GaInP/GaAs dual junction cell epitaxially grown over a sacrificial release layer suitable for post-release transfer-printing. Solar panels with 12.8% efficiency and 280 W/Kg specific power have been fabricated. We anticipate higher performance panels with specific power over 500 W/Kg can be achieved by printing higher efficiency three junction solar cells, optimizing the cell size and process improvements to reduce lamination thickness.