GaAs Solar Cells: Doubling the Power Output of Bifacial Thin‐Film GaAs Solar Cells by Embedding Them in Luminescent Waveguides (Adv. Energy Mater. 8/2013)

On page 991, Noel C. Giebink, John A. Rogers, and co-workers exploit microscale, bifacial thin-film GaAs solar cells embedded in luminescent substrates to double the output power under sunlight. The epitaxial liftoff and transfer printing techniques exhibit a potential for large-scale module production. Optimal design combines a free-standing waveguide layer with a diffuse backside reflector, delivering the highest photocurrent for microcells.