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Open Access item Optical absorption enhancement in a hybrid system photonic crystal -Thin substrate for photovoltaic applications
Munioz-Camuniez, Luis E.
Dotor, María Luisa
Postigo, Pablo Aitor
|Publisher:||Optical Society of America|
|Citation:||Optics Express 20: A452- A464 (2012)|
|Abstract:||A hybrid approach for light trapping using photonic crystal nanostructures (nanorods, nanopillars or nanoholes) on top of an ultra thin film as a substrate is presented. The combination of a nanopatterned layer with a thin substrate shows an enhanced optical absorption than equivalent films without patterning and can compete in performance with nanostructured systems without a substrate. The designs are tested in four relevant materials: Amorphous silicon (a-Si), crystalline silicon (Si), gallium arsenide (GaAs) and indium phosphide (InP). A consistent enhancement is observed for all of the materials when using a thin hybrid system (300 nm) even compared to the non patterned thin film with an anti-reflective coating (ARC). A realistic solar cell structure composed of a hybrid system with a layer of indium tin oxide (ITO) an ARC and a back metal layer is performed, showing an 18% of improvement for the nanostructured device. © 2012 Optical Society of America.|
|Appears in Collections:||(IMM-CNM) Artículos|
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