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Solar-cell efficiency enhancements using 2D photonic crystals

AutorPostigo, Pablo Aitor
Fecha de publicación2010
EditorSociety of Photo-Optical Instrumentation Engineers
CitaciónPhotonics Europe 2010 (2010)
ResumenIncreased performance can also be achieved for photon-sensing devices such as photodetectors and thermo-photovoltaic devices. The performance of solar cells (SCs) can be enhanced significantly by employing 2D photonic crystals (2D-PCs). They can either be used as omnidirectional, broadband antireflection coatings (ARCs) or applied to thin-film SCs (where PC effects are much more significant than in generic SCs). Although multilayer ARCs are commonly used, problems related to material selection, thermal mismatch, sensitivity to thickness variations, and instability of the thin-film stacks persist. Tapered, submicrometer patterned structures may offer a more practicalmethod for ultrabroadband, omnidirectional, antireflection operation.1 We have developed an optimized PC ARC that combines good optical properties (low reflectivity over a wide range of wavelengths) with high mechanical stability based on application of a thin dielectric layer perforated with the PC pattern. (A slight patterning of the PC inside the indium phosphide—InP— layer is required for optimum performance.) Thus, mixed, thin dielectric-layer/bulk patterning can be used for best optical and mechanical results compared to alternatives such as motheye- like fabrication, nanorods, and nanostructures employing oblique-angle deposition methods, which may be damaged seriously even by smooth contact with other surfaces.
Versión del editorhttp://dx.doi.org/10.1117/2.1201005.002899
Aparece en las colecciones: (IMN-CNM) Comunicaciones congresos
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