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Enhanced quantum efficiency of Ge solar cells by a two-dimensional photonic crystal nanostructured surface

AuthorsPrieto-González, Iván ; Galiana, Beatriz ; Postigo, Pablo Aitor ; Algora, C.; Martínez Rodríguez, Luis Javier ; Rey-Stolle, I.
KeywordsElemental semiconductors
Gallium compounds
III-V semiconductors
Indium compounds
Issue Date11-May-2009
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 94(19): 191102 (2009)
AbstractA single-junction germanium solar cell with a photonic crystal nanostructured surface has been developed. The solar cell comprises a Ge p-n junction and an InGaP window layer. The InGaP window layer has been nanopatterned with an extended photonic crystal structure consisting on a triangular lattice of holes with submicronic sizes. Enhancements of the external quantum efficiency of 22% for a wide range of wavelengths and up to a 46% for specific wavelengths have been measured, which implies an increase in photocurrent between 11% and 22%. A clear correlation with the area of photonic crystal patterned has been observed.
Description3 pages, 5 figures.-- PACS: 84.60.Jt; 42.70.Qs
Publisher version (URL)http://dx.doi.org/10.1063/1.3133348
Appears in Collections:(IMN-CNM) Artículos
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