Abstract
The major drawback of thin-film photovoltaic cells (PVs) such as organic and quantum-dot PVs is their relatively low light absorption. We discuss multi-scale optical engineering schemes combining the advantages of both ray-optics and nanophotonics to achieve black absorption. Although many light trapping schemes have been proposed as a solution to compensate the low absorption, limited enhancement of ray-optical approach and narrow spectral response of nanophotonics tended to restrict the full photon absorption.
© 2014 Optical Society of America
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